It is narrated from Sayyiduna Abu Sa'id Khudri (may Allah be pleased with him) that when the Messenger of Allah (peace and blessings be upon him) would take a very strong oath, he would say: "By Him in Whose hand is the life of Abu al-Qasim! There will arise among my Ummah people such that you will consider your own deeds insignificant compared to theirs. They will recite the Qur'an, but the Qur'an will not go below their throats. They will go out of the religion just as an arrow passes cleanly through the prey." The noble Companions said: "O Messenger of Allah (peace and blessings be upon him), please describe some of their signs for us so that we may recognize them." He (peace and blessings be upon him) said: "One of them will have a hand like a woman's breast, and their heads will be shaved." Sayyiduna Abu Sa'id Khudri (may Allah be pleased with him) said: "More than twenty Companions narrated to me that Sayyiduna Ali (may Allah be pleased with him) killed them." It is narrated from Asim that I saw Abu Sa'id (may Allah be pleased with him); he had become old and his hands trembled. He used to say: "In my view, killing these Khawarij is more virtuous and important than fighting the Turks to the same extent."