Hakim bin Iqal (may Allah have mercy on him) said: The case of a woman was brought to Shurayh (may Allah have mercy on him); she had left behind two sons of her paternal uncle, one of whom was her husband and the other her maternal half-brother. Shurayh (may Allah have mercy on him) gave the husband half and gave the rest to the maternal half-brother. This reached Sayyiduna Ali (may Allah be pleased with him), so he sent for Shurayh (may Allah have mercy on him) and said: "Call this insolent slave to me." When Shurayh was called, he said: "What did you rule?" Shurayh (may Allah have mercy on him) said: "I gave the husband half and gave the maternal half-brother the remainder." Sayyiduna Ali (may Allah be pleased with him) said: "Did you rule this by the Book of Allah or by a Sunnah of the Messenger of Allah (peace and blessings be upon him)?" Shurayh (may Allah have mercy on him) said: "By the Book of Allah." Sayyiduna Ali (may Allah be pleased with him) asked: "Where?" Shurayh (may Allah have mercy on him) recited: "And those of blood relationship are more entitled to one another in the Book of Allah" [Surah al-Anfal: 75]. Sayyiduna Ali (may Allah be pleased with him) said: "Does it say: half for the husband, and the rest for this one?" Then Sayyiduna Ali (may Allah be pleased with him) gave the husband half and gave the maternal half-brother a sixth. Then he divided the remainder between the two of them.
Hadith Referenceالسنن الكبرى للبيهقي / كتاب الفرائض / 12377