Nehemiah 4:16-18

From that day on, half my people worked on the wall. The other half was ready with spears, shields, bows, and armor. The officers stood in back of the people of Judah who were building the wall. Those who carried materials did their work with one hand and carried a weapon with the other. Each builder wore his sword at his side as he worked. The man who blew the trumpet to warn the people stayed next to me.