Isa bin Hammad bin Muslim, Zaghba عيسى بن حماد بن مسلم أبو موسى زغبة · The Book of Jihad

"A man came to the Messenger of Allah (ﷺ) and asked him for permission to go for Jihad. He said: 'Are your parents alive?' He said: 'Yes.' He said: 'Then strive for their sake.'"