Quran 3:169 — The Amramites (Ali-'Imran)

Do not think that those who are killed in the cause of GOD are dead; they are alive at their Lord, enjoying His provisions.

[3:168] They said of their kinsmen, as they stayed behind, "Had they obeyed us, they would not have been killed." Say, "Then prevent your own death, if you are truthful."

[3:170] They are rejoicing in GOD's grace, and they have good news for their comrades who did not die with them, that they have nothing to fear, nor will they grieve.