Nehemiah 4:15-16

And when it came to the ears of those who were against us, that we had knowledge of their designs and that God had made their purpose come to nothing, we all went back to the wall, everyone to his work And from that time, half of my servants were doing their part of the work, and half kept the spears and body-covers and the bows and the metal war-dresses; and the chiefs were at the back of the men of Judah.