TSK · Judges 13:5

"Speak to the children of Israel, and tell them: 'When either man or woman shall make a special vow, the vow of a Nazirite, to separate himself to Yahweh,

He told her all his heart, and said to her, "No razor has ever come on my head; for I have been a Nazirite to God from my mother's womb. If I am shaved, then my strength will go from me, and I will become weak, and be like any other man."

So the Philistines were subdued, and they came no more within the border of Israel. The hand of Yahweh was against the Philistines all the days of Samuel.

After this it happened, that David struck the Philistines, and subdued them, and took Gath and its towns out of the hand of the Philistines.