Muhammad bin 'Abdullah bin 'Abdul Hakam محمد بن عبد الله بن عبد الحكم · The Book of Jihad

"Two will never be gathered together in the Fire: A Muslim who killed a disbeliever then tried his best and did not deviate. And two will never be gathered together in the lungs of a believer: Dust in the cause of Allah, and the odor of Hell. And two will never be gathered in the heart of a salve: Faith and envy."

"I heard the Messenger of Allah (ﷺ) say: 'Allah has guaranteed: 'For the one who goes out in the cause of Allah, and nothing makes him do that except faith in Me, and Jihad in My cause - that He will admit him to Paradise whether he is killed or he dies, or He will return him to his home from which he departed with whatever he has earned of reward or spoils of war.'"