Al-Ahzab 33:4 ما جعل الله لرجل من قلبين في جوفه وما جعل ازواجكم اللايي تظاهرون منهن امهاتكم وما جعل ادعياءكم ابناءكم ذالكم قولكم بافواهكم والله يقول الحق وهو يهدي السبيل ٤

Allâh has not made for any man two hearts inside his body. Neither has He made your wives whom you declare to be like your mothers’ backs, your real mothers. [az-Zihâr is the saying of a husband to his wife, "You are to me like the back of my mother" i.e. You are unlawful for me to approach],¹ nor has He made your adopted sons your real sons. That is but your saying with your mouths. But Allâh says the truth, and He guides to the (Right) Way.