John Gill Commentary Judges 17:3

"And he restored the eleven hundred [pieces] of silver to his mother; and his mother said, I verily dedicate the silver unto Jehovah from my hand for my son, to make a graven image and a molten image: now therefore I will restore it unto thee." — Judges 17:3 (ASV)

And when he had restored the eleven hundred shekels of silver
to his mother
The whole sum, having embezzled none of it:

his mother said, I had wholly dedicated the silver unto the Lord from
my hand, for my son to make a graven image and a molten image ;
this she had done either before it was stolen, and it troubled her the more, and caused her the rather to curse the man that had taken it; or after it was stolen, that if it should be recovered again she would appropriate it to such an use; so Abarbinel; and by the Lord, or Jehovah, she doubtless meant the true God; for she had no intention to forsake him, but to worship him in and by these images, and which she designed for the use of her son and his family, that they might not go so far as Shiloh to worship at the tabernacle there:

therefore I will restore it unto thee ;
for that use, and so gave him the money again, to be laid out in images, or to make images of it.