Judges 16:14; Judges 16:19

14 So while he slept, Delilah took the seven locks of his hair and wove them into the web ]. And she fastened it with the pin and said to him, "The Philistines are upon you, Samson!" But he awoke from his sleep and pulled out the pin of the loom and the web.

19 She made him sleep on her knees, and called for a man and had him shave off the seven locks of his hair. Then she began to afflict him, and his strength left him.