In the name of Allah, the most Gracious, the most Merciful
(33:4) Allah has not made for a man two hearts in his interior. And He has not made your wives whom you declare unlawful your mothers. And he has not made your adopted sons your [true] sons. That is [merely] your saying by your mouths, but Allah says the truth, and He guides to the [right] way.
(33:5) Call them by [the names of] their fathers; it is more just in the sight of Allah. But if you do not know their fathers – then they are [still] your brothers in religion and those entrusted to you. And there is no blame upon you for that in which you have erred but [only for] what your hearts intended. And ever is Allah Forgiving and Merciful.