Imam al-Shafi'i (may Allah have mercy on him) reported that we said: When a Magian accepts Islam, and a man's daughter is also his wife, or his sister is also his mother, we look at the stronger of the two kinships and make her inherit by it, and we drop the other; the stronger of the two is the one more firmly established in every case. So when she is both a mother and a sister, we make her inherit as a mother, because the mother remains established in every case while the sister may lapse. All their shares follow these positions in the same way. And some people said: I would make her inherit from both aspects together.
Hadith Referenceالسنن الكبرى للبيهقي / كتاب الفرائض / 12506
It is reported from al-Hasan (may Allah have mercy on him) concerning a Magian who has his daughter or his sister as his wife and then dies: she inherits by the nearer of the two kinships.
Hadith Referenceالسنن الكبرى للبيهقي / كتاب الفرائض / 12507
Al-Zuhri (may Allah have mercy on him) was asked about Magians who become Muslim while having two kinships (with the deceased), and al-Zuhri (may Allah have mercy on him) said: He will be made an heir by the nearer of the two.
Hadith Referenceالسنن الكبرى للبيهقي / كتاب الفرائض / 12508
It is mentioned from Sayyiduna Zayd bin Thabit (may Allah be pleased with him) that he said: "He inherits by the nearer of the two aspects, and does not inherit from two aspects."
Hadith Referenceالسنن الكبرى للبيهقي / كتاب الفرائض / 12509
Hammad bin Salamah (may Allah have mercy on him) said: I asked Hammad bin Abi Sulayman (may Allah have mercy on him) about the inheritance of Magians, and he said: They inherit by one of the two aspects, the aspect that is lawful.
Hadith Referenceالسنن الكبرى للبيهقي / كتاب الفرائض / 12510
It is narrated from Yahya bin al-Jazzar that Sayyiduna Ali (may Allah be pleased with him) used to make Magians inherit from both aspects, when she was his mother, his wife, his sister or his daughter.
Al-Hasan bin Umarah is matruk (abandoned).
Hadith Referenceالسنن الكبرى للبيهقي / كتاب الفرائض / 12511
It is narrated from al-Sha'bi that Sayyiduna Ali and Ibn Mas'ud (may Allah be pleased with them both) said regarding Magians: He will be made an heir from two aspects.
The narrations from the Companions on this subject are not strong.
Hadith Referenceالسنن الكبرى للبيهقي / كتاب الفرائض / 12512