Judges 16:6

3 And Samson lay till midnight, and arose at midnight, and took the doors of the gate of the city, and the two posts, and went away with them, bar and all, and put [them] upon his shoulders, and carried them up to the top of an hill that [is] before Hebron.

4 And it came to pass afterward, that he loved a woman in the valley of Sorek, whose name [was] Delilah.

5 And the lords of the Philistines came up unto her, and said unto her, Entice him, and see wherein his great strength [lieth], and by what [means] we may prevail against him, that we may bind him to afflict him: and we will give thee every one of us eleven hundred [pieces] of silver.

6 And Delilah said to Samson, Tell me, I pray thee, wherein thy great strength [lieth], and wherewith thou mightest be bound to afflict thee.

7 And Samson said unto her, If they bind me with seven green withs that were never dried, then shall I be weak, and be as another man.

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

9 Now [there were] men lying in wait, abiding with her in the chamber. And she said unto him, The Philistines [be] upon thee, Samson. And he brake the withs, as a thread of tow is broken when it toucheth the fire. So his strength was not known.