Abdur Rahman bin Sharih عبد الرحمن بن شريح أبو شريح المعافري · The Book of Jihad

"The dust in the cause of Allah and the smoke of Hell will never be combined in a man's face, and stinginess and faith can never be combined in a slave's heart."

"A man came to the Messenger of Allah (ﷺ) and said: 'O Messenger of Allah, if I am killed in the cause of Allah with patience and seeking reward, facing the enemy and not running away, do you think that Allah will forgive my sins?' The Messenger of Allah (ﷺ) said: 'Yes.' When the man turned away, the Messenger of Allah (ﷺ) called him back and said: 'What did you say?' He repeated his question, and the Messenger of Allah…

"O Messenger of Allah, if I am killed in the cause of Allah, will Allah forgive my sins?" The Messenger of Allah (ﷺ) said: "Yes, if you are killed in the cause of Allah, and you are patient and seek reward, and you are facing the enemy, not running way - except for debt. Jibril (peace be upon him) told me that."

"The martyr does not feel the pain of being killed, except as any one of you feels a pinch."