It is narrated from Sayyiduna Qabeesah bin Dhu’ayb (may Allah be pleased with him) that a grandmother came to Sayyiduna Abu Bakr (may Allah be pleased with him) and demanded her share of inheritance, but he said: I do not know of any evidence in the Book of Allah or the Sunnah of the Messenger of Allah (peace and blessings be upon him) regarding your right. However, I will inquire about this from the people. Then he (may Allah be pleased with him) asked the people, and Sayyiduna Mugheerah bin Shu’bah (may Allah be pleased with him) said: I heard the Messenger of Allah (peace and blessings be upon him) say that he allotted one-sixth for the grandmother. Sayyiduna Abu Bakr (may Allah be pleased with him) said: Who will testify to this with you? Then Sayyiduna Muhammad bin Maslamah (may Allah be pleased with him) stood up and said the same thing as Sayyiduna Mugheerah (may Allah be pleased with him) had said. Thus, Sayyiduna Abu Bakr (may Allah be pleased with him) allotted this share for her.
Hadith Takhrij«الحديث صحيح بالشواھد۔ أخرجه ابوداود: 2894، والترمذي: 2101، وابن ماجه: 2724 ، (انظر مسند أحمد ترقيم الرسالة: 17980 ترقیم بيت الأفكار الدولية: 18143»
Brief Explanation
Benefits: … In the Arabic language, both paternal and maternal grandmothers are called "jaddah." In the science of inheritance, there are two types of "jaddah": (1) Jaddah Sahihah (correct grandmother) and (2) Jaddah Fasidah (incorrect grandmother). Only the former, that is, the Jaddah Sahihah, can be an heir.
Jaddah Sahihah: … This is the grandmother in whose lineage to the deceased there does not occur any incorrect grandfather (jad fasid). For example: maternal grandmother (nani), paternal grandmother (dadi), great-grandmother (pardadi).
Jaddah Fasidah: … This is the grandmother in whose lineage to the deceased there occurs an incorrect grandfather (jad fasid). For example: the mother of the maternal grandfather (nana ki maan). See the explanation of jad fasid at the beginning of the next chapter.