Judges 16:5-8

The rulers of the Philistines went to her and said, “Entice Samson to tell you what makes him so strong and how he can be overpowered and tied up securely. Then each of us will give you 1,100 pieces of silver.” So Delilah said to Samson, “Please tell me what makes you so strong and what it would take to tie you up securely.” Samson replied, “If I were tied up with seven new bowstrings that have not yet been dried, I would become as weak as anyone else.” So the Philistine rulers brought Delilah seven new bowstrings, and she tied Samson up with them.