﴿ وَإِمَّا نُرِيَنَّكَ بَعْضَ ٱلَّذِى نَعِدُهُمْ أَوْ نَتَوَفَّيَنَّكَ فَإِلَيْنَا مَرْجِعُهُمْ ثُمَّ ٱللَّهُ شَهِيدٌ عَلَىٰ مَا يَفْعَلُونَ ﴾

“And whether We show thee [in this world something of what We hold in store for those [deniers of the truth], or whether We cause thee to die [before that retribution takes place - know that, in the end], it is unto Us that they must return; and God is witness to all that they do.”

(Whether We let thee) O Muhammad (behold something of that which We promise them) of chastisement (or (whether We) cause thee to die) before We show you, O Muhammad, that which We promise them of chastisement, (still unto Us is their return) after they die, (and Allah, moreover, is Witness over what they do) of good and evil.