Adam Clarke's Bible Commentary Verse 9. And Jethro rejoiced for all the goodness] Every part of Jethro's conduct proves him to have been a religious man and a true believer. His thanksgiving to Jehovah (ver. 10) is a striking proof of it; he first blesses God for the preservation of Moses, and next for the deliverance of the people from their bondage.
Matthew Henry Commentary
Verses 7-12 - Conversation concerning God's wondrous works is good, and edifies Jethro not only rejoiced in the honour done to his son-in-law, but in all the goodness done to Israel. Standers-by were more affected with the favours God had showed to Israel, than many were who received them Jethro gave the glory to Israel's God. Whatever we have the joy of, God must have the praise. They joined in a sacrifice of thanksgiving Mutual friendship is sanctified by joint worship. It is very good for relations and friends to join in the spiritual sacrifice of prayer an praise, as those that meet in Christ. This was a temperate feast; the did eat bread, manna. Jethro must see and taste that bread from heaven and though a gentile, is welcome: the gentiles are welcomed to Chris the Bread of life.
Original Hebrew ויחד2302 יתרו3503 על5921 כל3605 הטובה2896 אשׁר834 עשׂה6213 יהוה3068 לישׂראל3478 אשׁר834 הצילו5337 מיד3027 מצרים׃4713