Judges 16:19-20

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. 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.