"People ask your pronouncement. Say: God enjoins you about your kalalah heirs that if a man dies childless and he has only a sister, then she shall inherit half of what he leaves and if a sister dies childless, then her brother shall be her heir; and if there are two sisters, then they shall inherit two-thirds of what he [or she] leaves. If there are many brothers and sisters, then the share of each male shall be that of two females. God expounds unto you that you err not and God has knowledge of all things." Qur'an, [Quran 4:176]."
January 1, 1970
https://en.wikiquote.org/wiki/Islamic_inheritance_jurisprudence