Judges 16:19-20

19Delilah made Samson sleep with his head on her knees. She called a man to come and he cut off the seven tails of Samson's hair. This made Samson helpless, so that he had no more strength.

20Then Delilah shouted, ‘Samson, the Philistines are here!’ He woke up and he thought, ‘I will make myself free as I have always done before.’ But he did not realize that the Lord had gone away from him.