Jami At Tirmidhi
1047
Sahih+3

Ja'far bin Muhammad narrated that:His father said: "The one who made the Lahd in the grave of the Messenger of Allah was Abu Talhah. And the one who placed the velvet cloth under him was Shuqran a freed slave of Messenger of Allah

SahihAhmad Muhammad Shakir
SahihAl-Albani