Judges 16:7-9

7Samson said to her, “If they bind me with seven fresh cords (tendons) that have not been dried, then I will be weak and be like any [other] man.”

8Then the Philistine lords brought her seven fresh cords that had not been dried, and she bound him with them.

9Now she had men lying in ambush in an inner room. And she said to him, “The Philistines are upon you, Samson!” And he broke the cords as a string of tow breaks when it touches fire. So [the secret of] his strength was not discovered.