Judges 15:14 in the King James Version
And when he came unto Lehi, the Philistines shouted against him: and the Spirit of the LORD came mightily upon him, and the cords that were upon his arms became as flax that was burnt with fire, and his bands loosed from off his hands.
Context
13 They spoke to him, saying, “No, but we will bind you securely and deliver you into their hands; but surely we will not kill you.” They bound him with two new ropes, and brought him up from the rock.
14 When he came to Lehi, the Philistines shouted as they met him. Then the LORD’s Spirit came mightily on him, and the ropes that were on his arms became as flax that was burned with fire; and his bands dropped from off his hands.
15 He found a fresh jawbone of a donkey, put out his hand, took it, and struck a thousand men with it.