Al-Mujadilah - 58:2

الَّذِينَ يُظَاهِرُونَ مِنكُم مِّن نِّسَائِهِم مَّا هُنَّ أُمَّهَاتِهِمْ إِنْ أُمَّهَاتُهُمْ إِلَّا اللَّائِي وَلَدْنَهُمْ وَإِنَّهُمْ لَيَقُولُونَ مُنكَرًا مِّنَ الْقَوْلِ وَزُورًا وَإِنَّ اللَّهَ لَعَفُوٌّ غَفُورٌ
[58:2]
(As for) those of you who put away their wives by likening their backs to the backs of their mothers, they are not their mothers; their mothers are no others than those who gave them birth; and most surely they utter a hateful word and a falsehood and most surely Allah is Pardoning, Forgiving.
If any men among you divorce their wives by Zihar (calling them mothers), they cannot be their mothers: None can be their mothers except those who gave them birth. And in fact they use words (both) iniquitous and false: but truly Allah is one that blots out (sins), and forgives (again and again).
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.