Imam Malik's Muwatta, Chapter: Jihad

Yahya related to me from Malik from Yahya ibn Said from Abu Salih as-Samman from Abu Hurayra that the Messenger of Allah, may Allah bless him and grant him peace, said, "Had I not been concerned for my community, I would have liked never to stay behind a raiding party going out in the way of Allah. However, I do not find the means to carry them to it, nor do they find anything on which to ride out and it is grievous for them that they should stay behind me. I would like to fight in the way of Allah and be killed, then brought to life so I could be killed and then brought to life so I could be killed."