Quran 33:37 — The Parties (Al-Ahzab)

Recall that you said to the one who was blessed by GOD, and blessed by you, "Keep your wife and reverence GOD," and you hid inside yourself what GOD wished to proclaim. Thus, you feared the people, when you were supposed to fear only GOD. When Zeid was completely through with his wife, we had you marry her, in order to establish the precedent that a man can marry the divorced wife of his adopted son. GOD's commands shall be done.

[33:36] No believing man or believing woman, if GOD and His messenger issue any command, has any choice regarding that command. Anyone who disobeys GOD and His messenger has gone far astray.

[33:38] The prophet is not committing an error by doing anything that is made lawful by GOD. Such is GOD's system since the early generations. GOD's command is a sacred duty.