It is narrated from Abu Salamah that a man came to Sayyiduna Ibn Abbas (may Allah be pleased with them both) and asked: A man has died and left his daughter and his full sister (so what is the ruling on the inheritance)? He said: "The daughter gets half, and the sister gets nothing." The man said: Sayyiduna Umar (may Allah be pleased with him) gave a ruling contrary to this, that the daughter gets half and the sister also gets half! Sayyiduna Ibn Abbas (may Allah be pleased with them both) said: "Do you know better, or Allah?" (The narrator says:) I did not understand the reason for this until I met Ibn Tawus. I mentioned this hadith of al-Zuhri to him, and he told me that his father heard Sayyiduna Ibn Abbas (may Allah be pleased with them both) say: Allah, the Mighty and Majestic, says: "If a man dies having no child, and he has a sister, then for her is half of what he left" [Surah al-Nisa: 176] . What Ibn Abbas (may Allah be pleased with them both) meant was that you people have fixed half for the sister even when the deceased has a child (a daughter). This hadith is sahih (authentic) on the condition of the two Shaykhs (Bukhari and Muslim), but they did not record it.