Yahya related to me from Malik from Abu'z-Zinad from al-Araj from
Abu Hurayra that the Messenger of Allah, may Allah bless him and grant
him peace, said "Someone who does jihad in the way of Allah is like
someone who fasts and prays constantly and who does not slacken from
his prayer and fasting until he returns."
Muwatta Malik Book 21, Hadith 1