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 person can ever die except by Allah's Leave and at an appointed term. And whoever desires a reward in (this) world, We shall give him of it; and whoever desires a reward in the Hereafter, We shall give him thereof. And We shall reward the grateful 145 And how many a prophet has had to fight [in God's cause,] followed by many God-devoted men: and they did not become faint of heart for all that they had to suffer in God's cause, and neither did they weaken, nor did they abase themselves [before the enemy,] since God loves those who are patient in adversity; 146 And all they said was this: 'Our Lord! Forgive us our sins, and our excesses, and set our feet firm, and succour us against those who deny the Truth.' 147 So Allah gave them the reward of the world and the good reward of the Hereafter. Allah loveth those whose deeds are good. 148