Exodus 18:8
And Moses told his father in law all that the LORD had done unto Pharaoh and to the Egyptians for Israel’s sake, and all the travail that had come upon them by the way, and how the LORD delivered them. And Moses told his father in law all that the LORD had done unto Pharaoh and to the Egyptians for Israel’s sake, and all the travail that had come upon them by the way, and how the LORD delivered them.
Moses recounted to Jethro his father-in-law all that the Lord had done for Israel's sake against Pharaoh and the Egyptians, all the travail that had come upon Israel by the way, and how the Lord had delivered them. Jethro rejoiced at the account and blessed the Lord. He then joined Moses and the elders in sacrifice and a feast commemorating God's mercy. In this account Jethro was singled out from the Gentile world to reveal the principles of heaven. He was one of God's appointed witnesses through whom God gave evidence of heavenly truth.