´Thumamah bin Shufa narrated:` "We were with Fadalah bin 'Ubaid in the land of the Romans, and a companion of ours died. Fadalah ordered that his grave be made level, then he said: 'I heard the Messenger of Allah commanding that it be made level."'
Hadith ReferenceSunan an-Nasa'i / The Book of Funerals / Hadith: 2032
Hadith Gradingالألبانی:صحيح | زبیر علی زئی:صحيح مسلم