Abu Huraira reported God’s Messenger as saying, “A man must 'not ask a woman in marriage when his brother has done so already, until he marries or gives her up."
He reported God’s Messenger as saying, “A woman must not ask to have her sister* divorced in order to deprive her of what belongs to her, but she must marry, because she will have what has been decreed for her."
(Bukhari and Muslim.)
* The word ‘sister’ is here used in a general sense. The tradition has been explained as referring to one of a man’s wives trying to get him to divorce another, but it probably refers to a woman whom the man has asked in marriage wanting him to divorce his wife before she marries him.
