en_tn/isa/63/01.md

Who is this who comes from Edom

This Isaiah speaking as a watchman. The question and answer format is a way of presenting this information, but it is not to be understood literally. Isaiah did not actually see Yahweh approaching.

Bozrah

This is the capital city of Edom. (See: rc://en/ta/man/translate/translate-names)

It is I

Here "I" refers to Yahweh.