Numbers 10 – Was Moses’ father in-law a part of the nation of Israel? 2023

Num 10:29
Then Moses said to Hobab the son of Reuel the Midianite, Moses' father-in-law, "We are setting out to the place of which the LORD said, 'I will give it to you'; come with us and we will do you good, for the LORD has promised good concerning Israel."

Num 10:30
But he said to him, "I will not come, but rather will go to my own land and relatives."

Num 10:31
Then he said, "Please do not leave us, inasmuch as you know where we should camp in the wilderness, and you will be as eyes for us.

Moses father-in-law was going to leave them and go back to his own people. Moses urges him to go with them.

Num 10:32
"So it will be, if you go with us, it will come about that whatever good the LORD does for us, we will do for you."

The father-in-law of Moses essentially became a part of the nation of Israel, sharing in the blessings of the people.