Ye hear the sound of the trumpet - As the walls were very extensive, and the workmen consequently much scattered, their enemies might easily attack and destroy them successively, he therefore ordered them all to work as near to each other as they could; and himself, who was everywhere surveying the work, kept a trumpeter always with him, who was to sound when the enemy approached; and all were instantly to run to the place where they heard the sound.

In what place [therefore] ye hear the sound of the trumpet, (k) resort ye thither unto us: our God shall fight for us.
(k) Meaning, to resist their enemies, if need be.

In what place therefore ye hear the sound of the trumpet,.... Be it what part of the wall soever they were at work, even the most distant:
resort ye thither to us; to Nehemiah, and the half of his servants armed, where the trumpet was blown; that was to be the place of rendezvous:
our God shall fight for us; and give us victory over our enemies; none have any reason to be intimidated, when they shall hear the sound of the trumpet.