Muḥammad is no more than a messenger; other messengers have gone before him. If he were to die or to be killed, would you regress into disbelief? Those who do so will not harm Allah whatsoever. And Allah will reward those who are grateful.

Muhammad (صلى الله عليه وسلم) is no more than a Messenger, and indeed (many) Messengers have passed away before him. If he dies or is killed, will you then turn back on your heels (as disbelievers)? And he who turns back on his heels, not the least harm will he do to Allâh; and Allâh will give reward to those who are grateful.