Judges 15:6-8

6“Who did this?” the Philistines demanded. “Samson,” was the reply, “because his father-in-law from Timnah gave Samson’s wife to be married to his best man.” So the Philistines went and got the woman and her father and burned them to death.

7“Because you did this,” Samson vowed, “I won’t rest until I take my revenge on you!”

8So he attacked the Philistines with great fury and killed many of them. Then he went to live in a cave in the rock of Etam.