The Messenger of Allah ﷺ said: “If one of you were to sit on a live coal that burns him, that would be better for him than if he were to sit on a grave.” (Using translation from Ibn Mājah 1566)
قَالَ رَسُولُ اللهِ ﷺ لَأَنْ يَجْلِسَ أَحَدُكُمْ عَلَى جَمْرَةٍ حَتَّى تَحْتَرِقَ ثِيَابُهُ خَيْرٌ لَهُ مِنْ أَنْ يَجْلِسَ عَلَى قَبْرٍ