Musnad Ahmed: Hadith 3668

A man came to Abu Moosa and Salman bin Rabee'ah and asked them about a daughter, a son's daughter and a half-sister through the father (i.e., a case of inheritance). They said. The daughter gets half and the sister gets half. Go to Ibn Mas'ood (and check with him); he will agree with us. So he went to Ibn Mas'ood and told him what they had said. Ibn Mas'ood said: "I would go astray if I did (agree with them) and would not be one of the rightly guided" (al-An'am 6:56). I shall judge according to the verdict of the Messenger of Allah (ﷺ): Half goes to the daughter and one-sixth goes to the son's daughter. That makes two-thirds, and the remainder goes to the sister.