Musannaf Ibn Abi Shaybah

Matar Hasan narrates regarding the man who made a will for the children of his uncle, among whom are both men and women, the scholars say that in such a case, a man will be given a share equal to that of a woman. However, if he has said that a man should be given a share equal to that of two women, then it is possible that it should be done as such.