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﴾

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.