وَإِذۡ أَخَذَ ٱللَّهُ مِيثَٰقَ ٱلنَّبِيِّـۧنَ لَمَآ ءَاتَيۡتُكُم مِّن كِتَٰبٖ وَحِكۡمَةٖ ثُمَّ جَآءَكُمۡ رَسُولٞ مُّصَدِّقٞ لِّمَا مَعَكُمۡ لَتُؤۡمِنُنَّ بِهِۦ وَلَتَنصُرُنَّهُۥۚ قَالَ ءَأَقۡرَرۡتُمۡ وَأَخَذۡتُمۡ عَلَىٰ ذَٰلِكُمۡ إِصۡرِيۖ قَالُوٓاْ أَقۡرَرۡنَاۚ قَالَ فَٱشۡهَدُواْ وَأَنَا۠ مَعَكُم مِّنَ ٱلشَّـٰهِدِينَ
And (remember) when Allah took the Covenant of the Prophets, saying: "Take whatever I gave you from the Book and Hikmah (understanding of the Laws of Allah, etc.), and afterwards there will come to you a Messenger (Muhammad SAW) confirming what is with you; you must, then, believe in him and help him." Allah said: "Do you agree (to it) and will you take up My Covenant (which I conclude with you)?" They said: "We agree." He said: "Then bear witness; and I am with you among the witnesses (for this)."
فَمَن تَوَلَّىٰ بَعۡدَ ذَٰلِكَ فَأُوْلَـٰٓئِكَ هُمُ ٱلۡفَٰسِقُونَ
Then whoever turns away after this, they are the Fasiqun (rebellious: those who turn away from Allah's Obedience).
أَفَغَيۡرَ دِينِ ٱللَّهِ يَبۡغُونَ وَلَهُۥٓ أَسۡلَمَ مَن فِي ٱلسَّمَٰوَٰتِ وَٱلۡأَرۡضِ طَوۡعٗا وَكَرۡهٗا وَإِلَيۡهِ يُرۡجَعُونَ
Do they seek other than the religion of Allah (the true Islamic Monotheism worshipping none but Allah Alone), while to Him submitted all creatures in the heavens and the earth, willingly or unwillingly. And to Him shall they all be returned.