The Boy and the King
A king with every weapon could not kill one boy without the boy's permission — and the price the boy set bought faith for an entire nation.
The Prophet ﷺ told this story at length (Muslim 3005) — of a king in a former nation, his court magician, and a boy.
The aging magician asked for an apprentice, and the boy was chosen. But on his daily road sat a monk, and the boy kept stopping to listen. Between the magician's spells and the monk's truth, the boy asked Allah to show him — and when a great beast blocked the people's road, he said: "O Allah, if the monk's affair is dearer to You than the magician's, kill this beast so the people may pass." He threw a stone; the beast died; the boy knew.
He grew until he cured blindness and leprosy — always saying: "I heal no one. Allah heals. If you believe in Allah, I will pray for you." The king's blind courtier believed, saw, and named his Lord before the throne. Under torture he pointed to the boy; the boy, under torture, pointed to the monk; the monk was sawn in two rather than recant.
Then the king turned everything on the boy. Soldiers took him up a mountain to throw him off — the boy prayed, "O Allah, suffice me against them however You will" — the mountain shook, the soldiers fell. He walked back to the king. They took him out to sea — the boat capsized; only the boy returned, again asking the king, in effect: is that all?
Finally the boy told the king the truth he could not escape: "You cannot kill me until you gather the people, tie me to a trunk, and say: In the name of Allah, the Lord of the boy — and shoot."
The king, blind with power, did exactly that. The arrow struck; the boy died — and the entire field of gathered people cried out with one voice: "We believe in the Lord of the boy!"
The king had ditches dug and filled with fire for everyone who believed (85:4-8). They walked in rather than go back. But the empire of that king is dust without a name — and the boy's transaction stands in the Quran and the sunnah forever: one life, paid gladly, for a nation's faith.
Sources: Sahih Muslim 3005 (the People of the Ditch); Quran 85:4–8