Qur'an 58:2

ٱلَّذِينَ يُظَـٰهِرُونَ مِنكُم مِّن نِّسَآئِهِم مَّا هُنَّ أُمَّهَـٰتِهِمْ ۖ إِنْ أُمَّهَـٰتُهُمْ إِلَّا ٱلَّـٰٓـِٔى وَلَدْنَهُمْ ۚ وَإِنَّهُمْ لَيَقُولُونَ مُنكَرًا مِّنَ ٱلْقَوْلِ وَزُورًا ۚ وَإِنَّ ٱللَّهَ لَعَفُوٌّ غَفُورٌ

Such of you as put away your wives (by saying they are as their mothers) - They are not their mothers; none are their mothers except those who gave them birth - they indeed utter an ill word and a lie. And lo! Allah is Forgiving, Merciful.