Khalid bin al-Lajlaj al-Amiri خالد بن اللجلاج العامري · The Book of Jihad

"O Messenger of Allah! Which of the people is best?" He said: "One who strives with himself and his wealth in the cause of Allah." He said: "Then who, O Messenger of Allah?" He said: "Then a believer (isolating himself) in one of the mountain passes, who fears Allah and spares the people his evil."