Monotheism: Natural Instinct [30:30] Therefore, you shall devote yourself to the religion of strict monotheism. Such is the natural instinct placed into the people by GOD. Such creation of GOD will never change. This is the perfect religion, but most people do not know.

We Are Born With Instinctive Knowledge About God [7:172] Recall that your Lord summoned all the descendants of Adam, and had them bear witness for themselves: "Am I not your Lord?" They all said, "Yes. We bear witness." Thus, you cannot say on the Day of Resurrection, "We were not aware of this."
[7:173] Nor can you say, "It was our parents who practiced idolatry, and we simply followed in their footsteps. Will You punish us because of what others have innovated?"
[7:174] We thus explain the revelations, to enable the people to redeem themselves.

[16:120] Abraham was indeed an exemplary vanguard in his submission to GOD, a monotheist who never worshiped idols.

[16:123] Then we inspired you (Muhammad) to follow the religion of Abraham,* the monotheist; he never was an idol worshiper.

[10:105] I was commanded: "Keep yourself devoted to the religion of monotheism; you shall not practice idol worship.

[3:95] Say, "GOD has proclaimed the truth: You shall follow Abraham's religion - monotheism. He never was an idolater."

[4:125] Who is better guided in his religion than one who submits totally to GOD, leads a righteous life, according to the creed of Abraham: monotheism? GOD has chosen Abraham as a beloved friend.

[2:135] They said, "You have to be Jewish or Christian, to be guided." Say, "We follow the religion of Abraham - monotheism - he never was an idol worshiper."

[6:75] We showed Abraham the marvels of the heavens and the earth, and blessed him with certainty:
[6:76] When the night fell, he saw a shining planet. "Maybe this is my Lord," he said. When it disappeared, he said, "I do not like (gods) that disappear."
[6:77] When he saw the moon rising, he said, "Maybe this is my Lord!" When it disappeared, he said, "Unless my Lord guides me, I will be with the strayers."
[6:78] When he saw the sun rising, he said, "This must be my Lord. This is the biggest." But when it set, he said, "O my people, I denounce your idolatry.
[6:79] "I have devoted myself absolutely to the One who initiated the heavens and the earth; I will never be an idol worshiper."
[6:80] His people argued with him. He said, "Do you argue with me about GOD, after He has guided me? I have no fear of the idols you set up. Nothing can happen to me, unless my Lord wills it. My Lord's knowledge encompasses all things. Would you not take heed?
[6:81] "Why should I fear your idols? It is you who should be afraid, since you worship instead of GOD idols that are utterly powerless to help you. Which side is more deserving of security, if you know?"
[6:82] Those who believe, and do not pollute their belief with idol worship, have deserved the perfect security, and they are truly guided.
[6:83] Such was our argument, with which we supported Abraham against his people. We exalt whomever we will to higher ranks. Your Lord is Most Wise, Omniscient.

[60:4] A good example has been set for you by Abraham and those with him. They said to their people, "We disown you and the idols that you worship besides GOD. We denounce you, and you will see nothing from us except animosity and hatred until you believe in GOD ALONE." However, a mistake was commited by Abraham when he said to his father, "I will pray for your forgiveness, but I possess no power to protect you from GOD." "Our Lord, we trust in You, and submit to You; to You is the final destiny.

[60:6] A good example has been set by them for those who seek GOD and the Last Day. As for those who turn away, GOD is in no need (of them), Most Praiseworthy.

One God/One Message/One Religion [21:25] We did not send any messenger before you except with the inspiration: "There is no god except Me; you shall worship Me alone."

[16:36] We have sent a messenger to every community, saying, "You shall worship GOD, and avoid idolatry." Subsequently, some were guided by GOD, while others were committed to straying. Roam the earth and note the consequences for the rejectors.

[2:208] O you who believe, you shall embrace total submission; do not follow the steps of Satan, for he is your most ardent enemy.

[3:85] Anyone who accepts other than Submission as his religion, it will not be accepted from him, and in the Hereafter, he will be with the losers.

[3:19] The only religion approved by GOD is "Submission." Ironically, those who have received the scripture are the ones who dispute this fact, despite the knowledge they have received, due to jealousy. For such rejectors of GOD's revelations, GOD is most strict in reckoning.

[13:19] Is one who recognizes that your Lord's revelations to you are the truth equal to one who is blind? Only those who possess intelligence will take heed.

[21:24] Have they found other gods beside Him? Say, "Show me your proof. This is the message to my generation, consummating all previous messages." Indeed, most of them do not recognize the truth; this is why they are so hostile.

[30:31] You shall submit to Him, reverence Him, observe the Contact Prayers (Salat), and - whatever you do - do not ever fall into idol worship. [30:32] (Do not fall in idol worship,) like those who divide their religion into sects; each party rejoicing with what they have.

One God/One Religion [21:92] Your congregation is but one congregation, and I alone am your Lord; you shall worship Me alone.
[21:93] However, they divided themselves into disputing religions. All of them will come back to us (for judgment).
[21:94] As for those who work righteousness, while believing, their work will not go to waste; we are recording it.

Only One Religion
Monotheists vs Idol Worshipers [42:13] He decreed for you the same religion decreed for Noah, and what we inspired to you, and what we decreed for Abraham, Moses, and Jesus: "You shall uphold this one religion, and do not divide it." The idol worshipers will greatly resent what you invite them to do. GOD redeems to Himself whomever He wills; He guides to Himself only those who totally submit.
[42:14] Ironically, they broke up into sects only after the knowledge had come to them, due to jealousy and resentment among themselves. If it were not for a predetermined decision from your Lord to respite them for a definite interim, they would have been judged immediately. Indeed, the later generations who inherited the scripture are full of doubts.
[42:15] This is what you shall preach, and steadfastly maintain what you are commanded to do, and do not follow their wishes. And proclaim: "I believe in all the scriptures sent down by GOD. I was commanded to judge among you equitably. GOD is our Lord and your Lord. We have our deeds and you have your deeds. There is no argument between us and you. GOD will gather us all together; to Him is the ultimate destiny."

[22:54] Those who are blessed with knowledge will recognize the truth from your Lord, then believe in it, and their hearts will readily accept it. Most assuredly, GOD guides the believers in the right path.

[34:6] It is evident to those who are blessed with knowledge that this revelation from your Lord to you is the truth, and that it guides to the path of the Almighty, the Most Praiseworthy.

A Statement of Fact [5:82] You will find that the worst enemies of the believers are the Jews and the idol worshipers. And you will find that the closest people in friendship to the believers are those who say, "We are Christian." This is because they have priests and monks among them, and they are not arrogant.
[5:83] When they hear what was revealed to the messenger, you see their eyes flooding with tears as they recognize the truth therein, and they say, "Our Lord, we have believed, so count us among the witnesses.
[5:84] "Why should we not believe in GOD, and in the truth that has come to us, and hope that our Lord may admit us with the righteous people?"
[5:85] GOD has rewarded them for saying this; He will admit them into gardens with flowing streams. They abide therein forever. Such is the reward for the righteous.

[6:20] Those to whom we have given the scripture recognize this as they recognize their own children. The ones who lose their souls are those who do not believe.

[6:114] Shall I seek other than GOD as a source of law, when He has revealed to you this book fully detailed?* Those who received the scripture recognize that it has been revealed from your Lord, truthfully. You shall not harbor any doubt.

[28:52] Those whom we blessed with the previous scriptures will believe in this.
[28:53] When it is recited to them, they will say, "We believe in it. This is the truth from our Lord. Even before we heard of it, we were submitters."
[28:54] To these we grant twice the reward, because they steadfastly persevere. They counter evil works with good works, and from our provisions to them, they give.
[28:55] When they come across vain talk, they disregard it and say, "We are responsible for our deeds, and you are responsible for your deeds. Peace be upon you. We do not wish to behave like the ignorant ones."

[6:161] Say, "My Lord has guided me in a straight path - the perfect religion of Abraham, monotheism. He never was an idol worshiper."
[6:162] Say, "My Contact Prayers (Salat), my worship practices, my life and my death, are all devoted absolutely to GOD alone, the Lord of the universe.
[6:163] "He has no partner. This is what I am commanded to believe, and I am the first to submit."
[6:164] Say, "Shall I seek other than GOD as a lord, when He is the Lord of all things? No soul benefits except from its own works, and none bears the burden of another. Ultimately, you return to your Lord, then He informs you regarding all your disputes."