Jami` at-Tirmidhi 2102
جامع الترمذي#2102Da'ifAbdullah bin Mas'ud said, about the grandmother along with her daughter:"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
Scholarly Authentication
We show the most cautious grade (weakest-wins) as the overall label. Individual scholars graded it as follows:
Ahmad Muhammad ShakirDaif
Al-AlbaniDaif
Zubair Ali ZaiDaif
In-book reference: 29:13