Nothing Delilah bound Samson with was stong enough to hold him she tried alot of thing
Jdg 16:7 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.
Jdg 16:12 Delilah therefore took new ropes, and bound him therewith, and said unto him, The Philistines [be] upon thee, Samson. And [there were] liers in wait abiding in the chamber. And he brake them from off his arms like a thread.
Jdg 16:13 And Delilah said unto Samson, Hitherto thou hast mocked me, and told me lies: tell me wherewith thou mightest be bound. And he said unto her, If thou weavest the seven locks of my head with the web.
he simply went to sleep
Jdg 16:19 And she made him sleep upon her knees; and she called for a man, and she caused him to shave off the seven locks of his head; and she began to afflict him, and his strength went from him.