Numbers 10:2-10

2Make two silver trumpets. Of hammered work you shall make them, and you shall use them for asummoning the congregation and for breaking camp. 3And when bboth are blown, all the congregation shall gather themselves to you at the entrance of the tent of meeting. 4But if they blow only one, then cthe chiefs, the heads of the tribes of Israel, shall gather themselves to you. 5When you blow an alarm, dthe camps that are on the east side shall set out. 6And when you blow an alarm the second time, ethe camps that are on the south side shall set out. An alarm is to be blown whenever they are to set out. 7But when the assembly is to be gathered together, fyou shall blow a long blast, but you shall not gsound an alarm. 8 hAnd the sons of Aaron, the priests, shall blow the trumpets. The trumpets shall be to you for a perpetual statute throughout your generations. 9And iwhen you go to war in your land against the adversary who joppresses you, then you shall ksound an alarm with the trumpets, that you may be lremembered before the Lord your God, and you shall be saved from your enemies. 10 mOn the day of your gladness also, and at your appointed feasts and nat the beginnings of your months, you shall blow the trumpets over your burnt offerings and over the sacrifices of your peace offerings. They shall be oa reminder of you before your God: I am the Lord your God.”

2 Samuel 2:28

28So Joab blew the trumpet, and all the men stopped and pursued Israel no more, nor did they fight anymore.

2 Samuel 20:22

22Then the woman went to all the people pin her wisdom. And they cut off the head of Sheba the son of Bichri and threw it out to Joab. So he blew the trumpet, and they dispersed from the city, qevery man to his home. And Joab returned to Jerusalem to the king.

1 Corinthians 14:8

8And rif the bugle gives an indistinct sound, who will get ready for battle?
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