C. F. Keil and Franz Delitzsch on Nehemiah 4:14

Neh 4:14 (Hebrew_Bible_4:8) “And I looked, and rose up, and said.” These words can only mean: When I saw the people thus placed with their weapons, I went to them, and said to the nobles, etc., “Be not afraid of them (the enemies); remember the Lord, the great and the terrible,” who will fight for you against your enemies (Deu 3:22; Deu 20:3, and Deu 31:6), “and fight ye for your brethren, your sons and your daughters, your wives and your houses,” whom the enemies would destroy.  (Hebrew_Bible_4:9-17)

Thus was the design of the enemy circumvented, and the Jews returned to their work on the wall, which they had forsaken to betake themselves to their weapons. The manner in which they resumed their building work was, that one half held weapons, and the other half laboured with weapons in hand.