Nehemiah 4:18-20

18Each of the builders had his sword strapped around his waist while he was building, and the one who sounded the ram’s horn was beside me.

19Then I said to the nobles, the officials, and the rest of the people, “The work is enormous and spread out, and we are separated far from one another along the wall.

20Wherever you hear the sound of the ram’s horn, rally to us there. Our God will fight for us!”