Nehemiah 4:15-16

15And it happened, when our enemies heard that it was known to us, and that God had brought their plot to nothing, that all of us returned to the wall, everyone to his work.

16So it was, from that time on, that half of my servants worked at construction, while the other half held the spears, the shields, the bows, and wore armor; and the leaders were behind all the house of Judah.