Narrated Abu Hurairah:
The Messenger of Allah ﷺ as saying: It is better that one of you should sit on the live coals which burns his clothing and come in contact with his skin than that he should sit on a grave.

حَدَّثَنَا مُسَدَّدٌ، حَدَّثَنَا خَالِدٌ، حَدَّثَنَا سُهَيْلُ بْنُ أَبِي صَالِحٍ، عَنْ أَبِيهِ، عَنْ أَبِي هُرَيْرَةَ، قَالَ قَالَ رَسُولُ اللَّهِ ﷺ " لأَنْ يَجْلِسَ أَحَدُكُمْ عَلَى جَمْرَةٍ فَتَحْرِقَ ثِيَابَهُ حَتَّى تَخْلُصَ إِلَى جِلْدِهِ خَيْرٌ لَهُ مِنْ أَنْ يَجْلِسَ عَلَى قَبْرٍ " .