Mas'ud bin al-Hakam al-Thaqafi (may Allah have mercy on him) said: Sayyiduna Umar (may Allah be pleased with him) gave judgement concerning a woman who left her husband, her daughter, her maternal siblings and her full siblings. Sayyiduna Umar (may Allah be pleased with him) made the maternal and full siblings share equally in the third. A man said: O Commander of the Believers! You did not make them share in such-and-such a year. Sayyiduna Umar (may Allah be pleased with him) said: That was our judgement at that time, and this is our judgement today.
Ya'qub bin Sufyan said: This is an error; it is al-Hakam bin Mas'ud. Al-Bukhari said the same in meaning.
Hadith Referenceالسنن الكبرى للبيهقي / كتاب الفرائض / 12469