Mishkat al-Masabih #3019

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.