It's a lack of faith that makes people afraid of meeting challenges, and I believe in myself. - Muhammad Ali

It is reported on the authority of Abu Huraira that he heard the Messenger of Allah say: I have been commanded to fight against people, till they testify to the fact that there is no god but Allah, and believe in me (that) I am the messenger (from the Lord) and in all that I have brought. And when they do it, their blood and riches are guaranteed protection on my behalf except where it is justified by law, and their affairs rest with Allah.

It has been narrated on the authority of Abu Huraira (through another chain of transmitters) that the Messenger of Allah (may peace be upon him) said: Whom do you consider to be a martyr among you? They (the Companions) said: Messenger, of Allah, one who is slain in the way of Allah is a martyr. He said: Then (if this is the definition of a martyr) the martyrs of my Umma will be small in number. They asked: Messenger of Allah, who are they? He said: One who is slain in the way of Allah is a martyr; one who dies in the way of Allah, is a martyr; one who dies of plague is a martyr; one who dies of cholera is a martyr. Ibn Miqsam said: I testify the truth of your father's statement (with regard to this tradition) that the Holy Prophet (may peace be upon him) said: One who is drowned is a martyr.

One version has, "Who is fearful of Allah and spares people from his evil."