en_tn/jer/48/28.md

cliffs

A cliff is a steep side of a mountain.

Become like a dove ... in the rocks

This simile emphasizes the people should leave their cities and live in the rocky cliffs to hide from their enemies. (See: rc://en/ta/man/jit/figs-simile)

the mouth of a hole in the rocks

Here "mouth of a hole" is an idiom that means the entrance to a cave. Alternate translation: "the entrance to caves" or "an opening in the rocks" (See: rc://en/ta/man/jit/figs-idiom)