John Wesley on Numbers 24:21

The Kenites - The posterity or kindred of Jethro; not that part of them which dwelt among the Israelites, to whom the following words do not agree, but those of them who were mingled with the Amalekites and Midianites. Thy nest - Thy dwelling - place, so called, either because it was in an high place, as nests commonly are: or in allusion to their name, for ken in Hebrew signifies a nest.