مُسْنَدُ أَحْمَدَ
Musnad Ahmad 2645
Musnad of 'Abdullah bin al-'Abbas bin 'Abdul-Muttalib from the Prophet
It was narrated that Ibn 'Abbas (رضي الله عنه) said: There were two men in Madinah who dug graves: Abu 'Ubaidah bin al-Jarrah, who dug graves for the people of Makkah and Abu Talhah who dug graves for the Ansar and made a niche (lahd) for them. When the Messenger of Allah (ﷺ) died, al-'Abbas send two men to them, and said: O AIIah, choose for Your Prophet, They found Abu Talhah but they did not find Abu 'Ubaidah, so he dug a grave for him and made a niche.
Musnad Ahmad 2661Saheeh because of corroborating evidence; this is a da’eef i