Allah has not made for any man two hearts in his chest cavity, nor did he make your wives whom you subjected to Zihār, your mothers, nor did he make your adopted sons your (real) sons. That is (merely) a word uttered by your mouths. And Allah says the truth and He shows the (right) way.
Call them by (the name of) their (real) fathers; It is more equitable in the sight of Allah. And if you do not know their fathers, then they are your brothers in faith and your friends. There is no sin on you in the mistake you make, but in that which you do with intention of your heart; and Allah is Most-Forgiving, Very-Merciful.