The author writes as though the city of Zion were a woman. (See: [[rc://en/ta/man/translate/figs-personification]])
# he has desired her for his seat
Here "seat" represents either 1) his throne where he would rule, or 2) the place where he would stay. (See: [[rc://en/ta/man/translate/figs-metonymy]])
# he has desired her for his seat
"Yahweh has desired Zion for Yahweh's seat." This shows the actual participants.