The rhetorical question that begins with the words "Who has untied" in verse 5 ends here. This can be translated as a statement. "I am the one who has untied ... whose home I have made in the Arabah, his house in the salt land." (See: [[rc://en/ta/man/jit/figs-rquestion]])
Yahweh describes the donkey as though he were a person that had a house. "I gave him the Arabah as a place to live" (See: [[rc://en/ta/man/jit/figs-personification]])