Exodus 18:10-12

10Jethro said, “Blessed be the Lord, who has rescued you from the hand of the Egyptians and from the hand of Pharaoh, and who has rescued the people from under the hand of the Egyptians.

11Now I know that the Lord is greater than all gods; indeed, it was proven when they acted insolently toward Israel [and the Lord showed Himself infinitely superior to all their gods].”

12Then Jethro, Moses’ father-in-law, took a burnt offering and [other] sacrifices [to offer] to God, and Aaron came with all the elders of Israel to eat a meal with Moses’ father-in-law before God.