Yahya ibn Sa'id narrated that Sayyiduna Umar ibn al-Khattab, may Allah be pleased with him, used to say: The honor of a believer is in his piety, and his religion is his nobility, and his dignity is his character. Bravery and cowardice are both innate qualities; Allah places these traits in whomever He wills. The coward flees, abandoning his parents, while the brave one fights against the person whom he knows will not let him reach home. Killing is one of the deaths among deaths, and the martyr is the one who willingly surrenders his soul to Allah.