Numbers 10:29-30

29Now Moses said to Hobab the son of Reuel the Midianite, Moses’ father-in-law, “We are setting out for the place of which the Lord said, ‘I will give it to you.’ Come with us, and we will treat you well; for the Lord has promised good things to Israel.”

30And he said to him, “I will not go, but I will depart to my own land and to my relatives.”