Judges 16: 1-22 NASB
19 She made him sleep on her knees, and called for a man and had him shave off the seven locks of his hair. Then she began to afflict him, and his strength left him. 20 She said, "The Philistines are upon you, Samson!" And he awoke from his sleep and said, "I will go out as at other times and shake myself free." But he did not know that the Lord had departed from him. 21Then the Philistines seized him and gouged out his eyes; and they brought him down to Gaza and bound him with bronze chains, and he was a grinder in the prison. 22However, the hair of his head began to grow again after it was shaved off.