The phrase "the bars of your gates" represent the city as a whole. Yahweh will make Jerusalem secure from enemy invasion. Alternate translation: "For he protects Jerusalem" (See: [[rc://en/ta/man/translate/figs-synecdoche]])
The writer speaks of those who live in Jerusalem as if they were Jerusalem's children. Alternate translation: "he blesses those who live in Jerusalem" (See: [[rc://en/ta/man/translate/figs-metaphor]])