Exodus 18:9 - Coke's Commentary on the Holy Bible

And Jethro rejoiced— The Hebrew word חדה chidah, signifies to be transported with great joy: the LXX, therefore, translate it, very properly, εξεστη, he was in an exstacy. Jethro appears to have been a good man, and a believer: the context seems to prove this, as well as the marriage of Moses into his family; nor can we be of the opinion of those who think that he was now made a proselyte to the Jewish faith. He speaks of Jehovah as a Being well known to him, Exodus 18:10. Jethro said, blessed be Jehovah, who hath delivered you, &c. And when he says, Exodus 18:11 now know I that Jehovah is greater than all gods; he may be well understood to express no more than what any Jew, or true believer, might express; that now, from this miraculous display of power, he had a full and convincing testimony of the omnipotence and all-ruling superiority of Jehovah. See Psalms 135:5; Psalms 95:3; Psalms 97:9 and note on ch. Exodus 15:11.