Exodus 18:8-10

"And Moses told his father-in-law all that Jehovah had done unto Pharaoh and to the Egyptians for Israel's sake, all the travail that had come upon them by the way, and how Jehovah had delivered them. And Jethro rejoiced for all the goodness which Jehovah had done to Israel, in that he had delivered them out of the hand of the Egyptians. And Jethro said, Blessed be Jehovah, who hath delivered you out of the hands of the Egyptians, and out of the hand of Pharaoh; who hath delivered the people from under the hand of the Egyptians."

"All the travil that had come upon them ..." Significantly, there is no mention of the repeated murmurings and rebellious unbelief of the people. It was an act of forbearance and generosity that Moses thus shielded the reputation of the people whom he loved.

"And Jethro rejoiced ..." The Septuagint (LXX) renders "amazed" instead of "rejoiced," basing it upon such Jewish opinions as that of Rashi who stated that the Hebrew word is related to [~hiddudiym], "denoting prickling with horror."[14] If this is the meaning, or "horrified" as some have translated it, it is paralleled in the N.T. instance of Felix being "terrified" at the preaching of the gospel (Acts 24:25). Certainly, we must reject the interpretation that supposes Jethro's reaction as due to his being "stung with grief and horror" because the Egyptians had to be destroyed![15] Our own version here is almost certainly correct, reminding us of those many instances in Acts, where it is stated that converts "went on their way rejoicing." As it stands, this word is strong presumptive proof that Jethro was already a worshipper of Jehovah.