Judges 16:7-9

7And Samson said to her, If they should bind me with seven fresh cords which have not been dried, then should I be weak, and be as another man.

8Then the lords of the Philistines brought up to her seven fresh cords which had not been dried, and she bound him with them.

9Now she had liers in wait abiding in the chamber; and she said to him, The Philistines are upon thee, Samson! And he broke the cords, as a thread of tow is broken when it touches the fire; and his strength was not known.