﴿ ترجمة: فلعلك باخع نفسك على آثارهم إن لم يؤمنوا بهذا الحديث أسفا ﴾
Perhaps, you, would kill yourself (O Muhammad SAW) in grief, over their footsteps (for their turning away from you), because they believe not in this narration (the Quran).
English - Sahih International
Tafheem-ul-Quran by Syed Abu-al-A'la Maududi
(18:6) Well, (O Muhammad), it may be that you will consume your life for their sake out of sorrow, if they do not believe in this message. *4