The Prophet has a greater claim on the faithful than they have on themselves, and his wives are (as) their mothers; and the possessors of relationship have the better claim in the ordinance of Allah to inheritance, one with respect to another, than (other) believers, and (than) those who have fled (their homes), except that you do some good to your friends; this is written in the Book.

And when you said to him to whom Allah had shown favor and to whom you had shown a favor: Keep your wife to yourself and be careful of (your duty to) Allah; and you concealed in your soul what Allah would bring to light, and you feared men, and Allah had a greater right that you should fear Him. But when Zaid had accomplished his want of her, We gave her to you as a wife, so that there should be no difficulty for the believers in respect of the wives of their adopted sons, when they have accomplished their want of them; and Allah's command shall be performed.