Al-Ahzab 33:4

God has not placed two hearts inside any man: [this was revealed] in order to refute those disbelievers who said that they each had two hearts with which they could reason better than Muhammad’s single mind; nor has He made your wives whom (read as allā’ī, or allā’) you repudiate by zihār (read tazzahharūna, or tuzāhirūna; the original tā’ [of tatazāharūna] has been assimilated with the zā’) — a man would say to his wife for example, ‘You are for me as [untouchable as] my mother’s back’ — your mothers, in other words, [He has not made you wives] like [your] mothers, so that they are illicit [for conjugality] in that respect, [a practice] which in pre-Islamic times was considered a [valid form of] divorce. An atonement with [necessary] conditions is necessary in such a case, as mentioned in sūrat al-Mujādila [Q. 58:2-3]. Nor has He made those whom you claim as [adopted] sons (ad‘iyā’, the plural of da‘iyy, which is one claimed as the son of one who is not his [biological] father) your sons, in reality. That is a mere utterance of your mouths, namely, [of] the Jews and the hypocrites. When the Prophet (s) married Zaynab bt. Jahsh, who had been Zayd b. Hāritha’s wife, the adopted son of the Prophet (s), they said, ‘Muhammad married his son’s wife!’, and so God proved them liars in this. But God speaks the truth, in this [matter], and He guides to the way, the way of truth.