Nehemiah 4:19-21

19Then I said to the nobles, the rulers, and the rest of the people, “The work is great and extensive, and we are separated far from one another on the wall.

20Wherever you hear the sound of the trumpet, rally to us there. Our God will fight for us.”

21So we labored in the work, and half of the men held the spears from daybreak until the stars appeared.