18:6
فَلَعَلَّكَ بَاخِعٌ نَفْسَكَ عَلٰٓى اٰثَارِهِمْ اِنْ لَمْ یُؤْمِنُوا بِهٰذَا الْحَدٖیثِ اَسَفًا
FalaAAallaka bakhiAAun nafsaka AAala atharihim in lam yuminoo bihatha alhadeethi asafan
Translations
Then perhaps you would kill yourself through grief over them, [O Muhammad], if they do not believe in this message, [and] out of sorrow
Saheeh International
Yet it may be, if they believe not in this statement, that thou (Muhammad) wilt torment thy soul with grief over their footsteps
Marmaduke Pickthall