Asim bin 'Umar bin Qatada al-Ansari عاصم بن عمر بن قتادة · Chapters On Inheritance

"A grandmother came to Abu Bakr to ask him about her inheritance. He said to her, 'There is noting for you in the Book of Allah and there is nothing for you in the Sunnah of the Messenger of Allah(S.A.W). So ,return until I ask the people. So he asked the people and Al-Mughirah bin Shu'bah said: 'I was present when the Messenger of Allah(S.A.W) gave her (case) a sixth.' So he said: 'Was anyone else with you?' Muhammad bin…

"The Messenger of Allah(S.A.W) gave the first grandmother, along with her son, a sixth for them to consume while her son was living."