Imam Sha’bi (may Allah have mercy on him) said: Sayyiduna Ali and Sayyiduna Ibn Mas’ud (may Allah be pleased with them both) said regarding the Magians that when they become Muslim, they will inherit from both sides of kinship.
Hadith Referenceسنن دارمي / من كتاب الفرائض / 3122
Hadith Takhrijاس حدیث کی سند میں ”رجل“ مجہول ہیں، ان کا نام پتہ معلوم نہیں۔ دیکھئے: [ابن أبى شيبه 11470] ، [البيهقي 260/6]
Brief Explanation
(Commentary on Hadith 3121)
The meaning of this narration is that if a Magian (Zoroastrian) marries his mother, sister, or daughter, then that woman will inherit from him in both capacities—as a wife and as a mother or sister. And Allah knows best.