Musannaf Ibn Abi Shaybah

It is narrated from Hazrat Abu Hurairah (may Allah be pleased with him) that the Prophet ﷺ said: Allah has promised him whoever goes out for jihad in My way, believing in Me and affirming My Messenger, I will admit him into Paradise as My responsibility, or I will return him to his home with reward and booty. After saying this, the Prophet ﷺ said: By the One in Whose hand is the life of Muhammad! If I did not fear difficulty for the Muslims, I would not remain behind from any army going out for jihad in the path of Allah. But since my remaining here is necessary, I dispatch people, and since their departure is necessary, they accept my command. Their hearts are not content that they leave me behind. By the One in Whose hand is the life of Muhammad! My desire is that I fight in the path of Allah, then I be martyred, then fight again, then I be martyred, then fight again, and then I be martyred.