Surah Al-Kahf — Ayah 6 (18:6)
فَلَعَلَّكَ بَٰخِعٞ نَّفۡسَكَ عَلَىٰٓ ءَاثَٰرِهِمۡ إِن لَّمۡ يُؤۡمِنُواْ بِهَٰذَا ٱلۡحَدِيثِ أَسَفًا ٦
English translation (Saheeh International)
Then perhaps you would kill yourself through grief over them, [O Muḥammad], if they do not believe in this message, [and] out of sorrow.
Brief commentary
Then perhaps, O Messenger, you will end up destroying yourself out of grief and remorse if they do not believe this Qur’ān. But do not do this, as giving them guidance is not your responsibility; you are only responsible for conveying.