The life of Samson is recorded in Judges 13-16 . God revealed to Samson’s parents that they would have a son. They were not to cut his hair and he would begin to deliver Israel from the Philistines. He would begin the job but King David would be the one who completed it. Samson is famous for his strength but his parents were never told anything about this. The discovery of how strong he was likely came as a surprise both to him and to his parents.
Here is the first incident recorded after he became an adult.
Samson went down to Timnah, and at Timnah he saw one of the daughters of the Philistines. Then he came up and told his father and mother, “I saw one of the daughters of the Philistines at Timnah. Now get her for me as my wife.”
But his father and mother said to him, “Is there not a woman among the daughters of your relatives, or among all our people, that you must go to take a wife from the uncircumcised Philistines?”
But Samson said to his father, “Get her for me, for she is right in my eyes.” (Joshua 14:1-3)