Sayyiduna Abu Hurayrah (may Allah be pleased with him) narrated that the Messenger of Allah (peace and blessings be upon him) said: "By the One in whose hand is my soul! Were it not that there are some Muslims who do not like to stay behind me, yet I cannot arrange mounts for them, I would not stay behind any detachment setting out in the way of Allah. By the One in whose hand is my soul! I would love to be killed in the way of Allah, then brought to life, then killed, then brought to life, then killed, then brought to life, then killed."
Hadith Referenceالسنن الكبرى للبيهقي / كتاب السير / 18554