Charles Ellicott Commentary Nehemiah 3:19

"And next to him repaired Ezer the son of Jeshua, the ruler of Mizpah, another portion, over against the ascent to the armory at the turning [of the wall]." — Nehemiah 3:19 (ASV)

At the turning of the wall. —Literally, the armoury of the corner: the north-west corner of the “city of David,” with its special wall.