Franz Delitzsch,
Biblical Commentary Old Testament…
(1885)
“ The saying concerning the Kenites runs thus: “Durable is thy dwelling-place, and thy nest laid upon the rock; for should Kain be destroyed until Asshur shall carry thee captive?” This saying “applies to friends and not to foes of Israel” (v. Hoffmann) , so that it is perfectly applicable to the Kenites, who were friendly with Israel. ”
