Judges 16:19-20

19And she made him sleep upon her knees, and called a man, and she caused him to shave off the seven locks of his head; and she began to overpower him, and his strength went from him.

20And she said, The Philistines are upon thee, Samson! And he awoke out of his sleep, and thought, I will go out as at other times before, and disengage myself. And he knew not that Jehovah had departed from him.