Musannaf Ibn Abi Shaybah 40719 — Reports on the Khawarij

Abu Salamah said: I said to Sayyiduna Abu Sa'id al-Khudri (may Allah be pleased with him): "Have you ever heard the Messenger of Allah (peace and blessings be upon him) mentioning the Haruriyyah?" Sayyiduna Abu Sa'id (may Allah be pleased with him) said: "Yes, I heard the Messenger of Allah (peace and blessings be upon him) mentioning a people who would worship. He said: 'You will consider your prayer insignificant in comparison with their prayer, and your fasting insignificant in comparison with their fasting. They will leave the religion as an arrow passes out of its target. He will take his sword, then look at the head of his arrow and find nothing there, look at its rear part and find nothing there either, look at the shaft of his arrow and find nothing there either, then look at the arrow's feathers and be in doubt whether he has seen anything or not.'"