Musnad Ahmad 4047

It was narrated from Huzail bin Shurahbeel that al-Ash’ari was asked about a daughter, a son's daughter, a sister through the father and mother (full sister) (i.e., a case of inheritance). He allocated half to the daughter and the rest to the sister, and he did not allocate anything to the son's daughter. They went to Ibn Mas'ood and told him (about that) and he said: I would go astray, and I would not be one of the rightly guided (cf. 6:45) if I accepted his verdict and ignored the verdict of the Messenger of Allah (ﷺ). Then Ibn Mas'ood said: The daughter gets one half, the son's daughter gets one sixth and what is left goes to the sister.