en_tn/num/24/21.md

the Kenites

This is the name of a people group who descended from Kain. (See: rc://en/ta/man/jit/translate-names)

The place where you live is strong

"The place were you live is well defended"

your nest is in the rocks

This is a metaphor that means that they live in a secure place. Alternate translation: "your location is as secure as a nest high in the rocks" (See: rc://en/ta/man/jit/figs-metaphor)