The chapter
Two weeks after the Opening, with Makkah newly submitted and two thousand of its men joining the army, the Muslims marched twelve thousand strong against the last great tribal coalition, Hawazin and Thaqif under Malik ibn Awf. Twelve thousand: more than they had ever fielded. And in the ranks a sentence was heard that the Qur'an would preserve as a specimen: "We will not be defeated today for lack of numbers."
Malik ibn Awf had packed the narrow defile of Hunayn with archers and ambushers in the dark of the last night-watch. As the Muslim vanguard entered the wadi in the half-light, the mountainsides opened fire at once. The vanguard broke; the retreat crashed into the columns behind; and within minutes an army of twelve thousand was a torrent running backward. The Qur'an describes the geometry of that moment with terrifying spareness: "…and the earth, vast as it is, narrowed upon you; then you turned back, fleeing."
A knot of men held: the Prophet ﷺ on his white mule, pressing forward toward the enemy while his army fled past him, calling out in the open, identifying himself to a battlefield of archers: "I am the Prophet, no lie! I am the son of Abdul-Muttalib!" Abbas, his uncle, possessed of a great voice, was ordered to call: "O companions of the tree! O companions of Surat al-Baqarah!" The Ansar wheeled in the rout like water reversing: "Labbayk! Labbayk!", cutting back through their own fleeing army to reach him.
Then the second army arrived, the one no scout had counted: "Then Allah sent down His tranquility upon His Messenger and upon the believers, and sent down soldiers you did not see." The line reformed around the mule; the Prophet threw a handful of pebbles at the enemy; and Hawazin's ambush unwound into flight. Their camp, families, and herds, six thousand captives, twenty-four thousand camels, fell to the Muslims, and at al-Ji'ranah the Prophet returned the captives free when Hawazin's delegation embraced Islam, then gave the huge-hearted gifts to Makkah's new Muslims that provoked the Ansar's famous hurt, answered with the tenderest question in the Seerah: "Are you not content that the people leave with sheep and camels, and you return with the Messenger of Allah to your homes?" They wept until their beards were wet: "We are content."
The Qur'an fixed the lesson in the verse the Codex hangs over this whole node: numbers are a gift, not a guarantee: "and your great number availed you nothing."