One day, after offering the morning prayers in congregation, the Holy Prophet (s.a.w.) looked around the mosque and his eyes fell upon a youth, Harithah Ibn Maalik Ansaari, who sat with his head lowered in a state of drowsiness. His face was pale, his body thin and weak and his eyes appeared to have sunk into their sockets. The Holy Prophet (s.a.w.) approached Harithah and inquired:
“What state are you in?”
“I find myself as a true believer,” replied the youth.
The Holy Prophet (s.a.w.) asked, “Everything possesses a truth; what is the truth behind what you claim?”
“O’ Prophet of Allah! I have become disenchanted with the world,” he answered. “I stay awake (in worship) in the night, and endure thirst (by observing fasts) in the day. It is as if I am witnessing the A’rsh (Throne) of God and the scenario of Reckoning, observing the inmates of Paradise meeting each other and hearing the shrieks of the inmates of hell.”
The Holy Prophet (s.a.w.) remarked, “This is a person, whose heart Allah has illuminated”. Then, addressing Harithah, he continued, “You have acquired perception and insight, so remain steadfast”.
Harithah beseeched: “O’ Prophet of Allah! Request Allah to grant me martyrdom while fighting alongside you!”
The Prophet prayed to Allah to grant martyrdom to Harithah. A few days later, he dispatched an army for battle and Harithah was included in it. During the battle, Harithah killed nine infidels before he himself was killed, being the tenth soldier from the Muslim force to taste the nectar of martyrdom.( Al-Kafi, vol. 2, ch.: The Chapter of Reality of Faith, tr. 2 & 3.)