Nehemiah 4:16-18

16And from that time forth the half of my servants wrought in the work, and the other half of them held the spears, and the shields, and the bows, and the corslets; and the captains were behind all the house of Judah.

17They that built on the wall, and they that bore burdens, with those that loaded, wrought in the work with one hand, and with the other they held a weapon.

18And the builders had every one his sword girded by his side, and built. And he that sounded the trumpet was by me.