Ibrahim bin Y'aqub bin Ishaq إبراهيم بن يعقوب بن إسحاق · The Book of Jihad

"There are three, all of whom have a promise of help from Allah: 'The Mujahid who strives in the cause of Allah, the Mighty and Sublime; the man who gets married, seeking to keep himself chaste; and the slave who has a contract of manumission and wants to buy his freedom.'"

"A man came to the Messenger of Allah (ﷺ) and said: 'Tell me of an action that is equal to Jihad.' He said: 'I cannot. When the Mujahid goes out, can you enter the Masjid and stand in prayer and never rest, and fast and never break your fast?' He said: 'Who can do that?'"

"The sanctity of the wives of the Mujahidin to those who stay behind is like the sanctity of their mothers. There is no man among those who stay behind who takes on the responsibility of looking after the wife of one of the Mujahidin (and betrays him) but he (the betrayer) will be made to stand before him on the Day Resurrection and it will be said: 'O So-and-so, this is so-and-so, take whatever you want from his good deeds.'"…