Surah Al-Kahf Verse 6

فَلَعَلَّكَ بَاخِعٌ نَفْسَكَ عَلَىٰ آثَارِهِمْ إِنْ لَمْ يُؤْمِنُوا بِهَٰذَا الْحَدِيثِ أَسَفًا

Then perhaps you would kill yourself through grief over them, [O Muhammad], if they do not believe in this message, [and] out of sorrow