The word(s) "slain" appears 20 time(s) in 18 verse(s) in Quran in Abdullah Yusuf Ali translation.

(1) When it is said to them, "Believe in what Allah Hath sent down, "they say, "We believe in what was sent down to us:" yet they reject all besides, even if it be Truth confirming what is with them. Say: "Why then have ye slain the prophets of Allah in times gone by, if ye did indeed believe?"

(2) And say not of those who are slain in the way of Allah: "They are dead." Nay, they are living, though ye perceive (it) not.

(3) O ye who believe! the law of equality is prescribed to you in cases of murder: the free for the free, the slave for the slave, the woman for the woman. But if any remission is made by the brother of the slain, then grant any reasonable demand, and compensate him with handsome gratitude, this is a concession and a Mercy from your Lord. After this whoever exceeds the limits shall be in grave penalty.

(4) Muhammad is no more than a messenger: many Were the messenger that passed away before him. If he died or were slain, will ye then Turn back on your heels? If any did turn back on his heels, not the least harm will he do to Allah; but Allah (on the other hand) will swiftly reward those who (serve Him) with gratitude.

(5) O ye who believe! Be not like the Unbelievers, who say of their brethren, when they are travelling through the Earth or engaged in fighting: "If they had stayed with us, they would not have died, or been slain." This that Allah may make it a cause of sighs and regrets in their hearts. It is Allah that gives Life and Death, and Allah sees well all that ye do.

(6) And if ye are slain, or die, in the way of Allah, forgiveness and mercy from Allah are far better than all they could amass.

(7) And if ye die, or are slain, Lo! it is unto Allah that ye are brought together.

(8) (They are) the ones that say, (of their brethren slain), while they themselves sit (at ease): "If only they had listened to us they would not have been slain." Say: "Avert death from your own selves, if ye speak the truth."

(9) Think not of those who are slain in Allah's way as dead. Nay, they live, finding their sustenance in the presence of their Lord;

(10) And their Lord hath accepted of them, and answered them: "Never will I suffer to be lost the work of any of you, be he male or female: Ye are members, one of another: Those who have left their homes, or been driven out therefrom, or suffered harm in My Cause, or fought or been slain,- verily, I will blot out from them their iniquities, and admit them into Gardens with rivers flowing beneath;- A reward from the presence of Allah, and from His presence is the best of rewards."