Mishkat al-Masabih 5 Funerals كتاب الجنائز 48

وَعَنْ جَابِرٍ قَالَ: قَالَ رَسُولُ اللَّهِ صَلَّى اللَّهُ عَلَيْهِ وَسَلَّمَ: «يَوَدُّ أَهْلُ الْعَافِيَةِ يَوْمَ الْقِيَامَةِ حِينَ يُعْطَى أَهْلُ الْبَلَاءِ الثَّوَابَ لَوْ أَنَّ جُلُودَهُمْ كَانَتْ قُرِضَتْ فِي الدُّنْيَا بِالْمَقَارِيضِ» . رَوَاهُ التِّرْمِذِيّ

Jabir reported God’s messenger as saying, “On the day of resurrection, when people who have suffered affliction are given their reward, those who are healthy will wish their skins had been cut to pieces with scissors when they were in the world.” Tirmidhi transmitted it, saying that this is a gharib tradition.