What did the Prophet Muhammad (saw) say about a woman asking for the divorce of her sister in order to have everything for herself?
 Narrated Abu Huraira:                     The Prophet said, "It is not lawful for a woman (at the time of wedding) to ask for the divorce of her sister (i.e. the other wife of her would-be husband) in order to have everything for herself, for she will take only what has been written for her."