What is the complete story of the boy whom no one could kill until he showed the king how to do so, whereupon the people of the city believed in the boy’s Lord?

The story of the People of the Ditch (Aṣḥāb al-Ukhdūd) is mentioned in Surat al-Buruj, and its details are found in Sahih Muslim. There was a king who had a sorcerer. When the sorcerer grew old, he asked the king to provide him with a boy to teach him magic. On his way, the boy met a monk and was impressed by his words, so he embraced Islam at his hands. The boy, with Allah's permission, cured the blind and the leper. A companion of the king embraced Islam after the boy cured him. The king learned of this and tortured his companion until he revealed the boy, then tortured the boy until he revealed the monk. The king killed the monk and his companion with a saw for refusing to recant their religion. The king tried to kill the boy twice: the first time by throwing him from a mountain, and the second by drowning him in the sea. The boy prayed to his Lord, and Allah sufficed him against their evil. The boy told the king that he would not be able to kill him unless he gathered the people, crucified him, and then shot an arrow at him, saying: "In the Name of Allah, the Lord of the boy." The king did so, and the boy died, and the people believed in the Lord of the boy. The king dug ditches and kindled fire in them, ordering that everyone who did not abandon their religion be burned. A woman came with her infant, and she hesitated. The boy said to her: "O mother, be patient, for indeed you are upon the truth."