Judges 16:19-20

And she made him sleep upon her knees; and she called for a man, and shaved off the seven locks of his head; and she began to afflict him, and his strength went from him. And she said, The Philistines are upon thee, Samson. And he awoke out of his sleep, and said, I will go out as at other times, and shake myself free. But he knew not that Jehovah was departed from him.