Muhammad is only a messenger. Messengers have passed away before him. If he should die, or be killed, will you turn back on your heels? Those who turn on their heels do not harm the Lord in the least. God will reward the grateful. 144 And no human being can die save by God's leave, at a term pre-ordained. And if one desires the rewards of this world, We shall grant him thereof; and if one desires the rewards of the life to come, We shall grant him thereof; and We shall requite those who are grateful [to Us]. 145 Many were the Prophets on whose side a large number of God-devoted men fought: they neither lost heart for all they had to suffer in the way of Allah nor did they weaken nor did they abase themselves. Allah loves such steadfast ones. 146 and all that they said was this: "O our Sustainer! Forgive us our sins and the lack of moderation in our doings! And make firm our steps, and succour us against people who deny the truth!" 147 whereupon God granted them the rewards of this world, as well as the goodliest rewards of the life to come: for God loves the doers of good. 148