(Did you think that this cause of Islam subsisted not by God but while Muhammad was alive among you? If so, know that this cause depends on God and as for his part in it, know that) Muhammad is but a Messenger, and Messengers passed away before him. If, then, he dies or is killed, will you turn back on your heels? Whoever turns back on his heels can in no way harm God. But God will (abundantly) reward the thankful ones (those who are steadfast in God’s cause).