Sunan an Nasai
3632
Sahih Isnaad+2

It was narrated from Sa'd that the Prophet visited him when he was sick, and he said:"O Messenger of Allah, shall I bequeath all of my wealth?" He said: "No." He said: "Half?" He said: "No." He said: "One-third?" He said: "One-third, and one-third is much or large

Sahih IsnaadAbu Ghuddah
Sahih IsnaadAl-Albani