Albert Barnes Commentary Judges 17:2

"And he said unto his mother, The eleven hundred [pieces] of silver that were taken from thee, about which thou didst utter a curse, and didst also speak it in mine ears, behold, the silver is with me; I took it. And his mother said, Blessed be my son of Jehovah." — Judges 17:2 (ASV)

You cursed - or, “adjured me by God.” Compare Matthew 26:63; Leviticus 5:1.