Abu Hurairah (RA) reported Allah's Messenger (ﷺ) as saying: It is better that one of you should sit on live coats which would burn his clothing and come in contact with his skin than that he should sit on a grave.
´It was narrated that Abu Hurairah said:` "The Messenger of Allah said: 'If any one of you were to sit on a live coal until it burns his garment, that would be better for him than sitting on a grave."
Hafiz Muhammad Ameen
For details, see Hadith: 2030.
Source: Sunan Nasa'i: Translation and Benefits by Shaykh Hafiz Muhammad Amin Hafizullah, Page: 2046