Zion. See App-68. If verses: Psalms 51:18; Psalms 51:19 are. later addition, then they were probably the work of Hezekiah in his editing the Psalms as well as the Proverbs, when the Psalm was handed over for public use. See App-67. But David was "a prophet" (Acts 2:30; Acts 2:31).
Related Commentaries of Psalms 51:18
Psalms 51:18
18 Do good in thy good pleasure unto Zion: build thou the walls of Jerusalem.