Flavius Josephus, Antiquities of the Jews
William Whiston, A.M., Ed.

[297] Now when Samson had slain many of the Philistines in the plain country, he dwelt at Etam, which is a strong rock of the tribe of Judah; for the Philistines at that time made an expedition against that tribe: but the people of Judah said that they did not act justly with them, in inflicting punishments upon them while they paid their tribute, and this only on account of Samson's offenses. They answered, that in case they would not be blamed themselves, they must deliver up Samson, and put him into their power. So they being desirous not to be blamed themselves, came to the rock with three thousand armed men, and complained to Samson of the bold insults he had made upon the Philistines, who were men able to bring calamity upon the whole nation of the Hebrews; and they told him they were come to take him, and to deliver him up to them, and put him into their power; so they desired him to bear this willingly. Accordingly, when he had received assurance from them upon oath, that they would do him no other harm than only to deliver him into his enemies' hands, he came down from the rock, and put himself into the power of his countrymen. Then did they bind him with two cords, and lead him on, in order to deliver him to the Philistines; and when they came to a certain place, which is now called the Jaw-bone, on account of the great action there performed by Samson, though of old it had no particular name at all, the Philistines, who had pitched their camp not far off, came to meet them with joy and shouting, as having done a great thing, and gained what they desired; but Samson broke his bonds asunder, and catching up the jaw-bone of an ass that lay down at his feet, fell upon his enemies, and smiting them with his jaw-bone, slew a thousand of them, and put the rest to flight and into great disorder.