NET
21 Then he looked on the Kenites and uttered this oracle: “Your dwelling place seems strong, and your nest is set on a rocky cliff.
Darby
21 And he saw the Kenites, and took up his parable, and said, Firm is thy dwelling-place, and thy nest fixed in the rock;
KJV
21 And he looked on the Kenites, and took up his parable, and said, Strong is thy dwellingplace, and thou puttest thy nest in a rock.