Judges 14:3-4

3His parents replied, ‘You do not need to go to the Philistines to get a wife. They are not the Lord's people. There is surely someone among our own relatives or other Israelites that you would like to marry.’ But Samson said to his father, ‘You must get her for me. She is the right girl for me to marry.’

4Samson's parents did not realize that the Lord was causing this to happen. The Lord wanted to prepare a way for the Israelites to attack the Philistines, because the Philistines were ruling over Israel at that time.