Nehemiah 4:18-20

18As for the builders, each wore his sword strapped to his waist as he built, while 1the trumpeter stood near me. 19And I said to the nobles, the officials, and the rest of the people, “The work is great and extensive, and we are separated on the wall far from one another. 20At whatever place you hear the sound of the trumpet, assemble to us there. 2Our God will fight for us.”