Musannaf Ibn Abi Shayba 26:65

Ibn Fudayl narrated to us, from Bassam, from Fudayl, from Ibrahim, regarding a man who left behind his two daughters and the children of his son, males and females: His two daughters have two-thirds, and what remains is for the males to the exclusion of the females. Abdullah [ibn Mas'ud] used not to increase the sisters and the daughters beyond two-thirds. Ali and Zayd used to make them partners among themselves, so what remained was for the male the like of the portion of two females. Abu Bakr said: This is from three shares according to all of their opinions.