Surat Al-Ahzaab (The Clans) - الأحزاب

مَّا جَعَلَ ٱللَّهُ لِرَجُلٍ مِّن قَلْبَيْنِ فِى جَوْفِهِۦ وَمَا جَعَلَ أَزْوَٰجَكُمُ ٱلَّٰٓـِٔى تُظَٰهِرُونَ مِنْهُنَّ أُمَّهَٰتِكُمْ وَمَا جَعَلَ أَدْعِيَآءَكُمْ أَبْنَآءَكُمْ ذَٰلِكُمْ قَوْلُكُم بِأَفْوَٰهِكُمْ وَٱللَّهُ يَقُولُ ٱلْحَقَّ وَهُوَ يَهْدِى ٱلسَّبِيلَ ﴿٤﴾ ٱدْعُوهُمْ لِءَابَآئِهِمْ هُوَ أَقْسَطُ عِندَ ٱللَّهِ فَإِن لَّمْ تَعْلَمُوٓا۟ ءَابَآءَهُمْ فَإِخْوَٰنُكُمْ فِى ٱلدِّينِ وَمَوَٰلِيكُمْ وَلَيْسَ عَلَيْكُمْ جُنَاحٌ فِيمَآ أَخْطَأْتُم بِهِۦ وَلَٰكِن مَّا تَعَمَّدَتْ قُلُوبُكُمْ وَكَانَ ٱللَّهُ غَفُورًا رَّحِيمًا﴿٥﴾

Allah has not made for any man two hearts within him; nor has He made your wives whose backs you liken to the backs of your mothers as your mothers, nor has He made those whom you assert to be your sons your real sons; these are the words of your mouths; and Allah speaks the truth and He guides to the way. Assert their relationship to their fathers; this is more equitable with Allah; but if you do not know their fathers, then they are your brethren in faith and your friends; and there is no blame on you concerning that in which you made a mistake, but (concerning) that which your hearts do purposely (blame may rest on you), and Allah is Forgiving, Merciful.