سنن النسائي

Abu Hurairah said: "I heard the Messenger of Allah (ﷺ) [SAW] say: 'Allah has promised the one who goes out in His cause 'and does not go out except with faith in Me and for Jihad in My cause,' that he is guaranteed to enter Paradise no matter how, either he is killed, or he dies, or he will be brought back to his home from which he departed having acquired whatever he acquired of reward or spoils of war.'"