Numbers 10:11

8 And the sons of Aaron, the priests, shall blow the trumpets; and they shall be to you for a statute for ever throughout your generations.

9 And when ye go to war in your land against the adversary that oppresseth you, then ye shall sound an alarm with the trumpets; and ye shall be remembered before Jehovah your God, and ye shall be saved from your enemies.

10 Also in the day of your gladness, and in your set feasts, and in the beginnings of your months, ye shall blow the trumpets over your burnt-offerings, and over the sacrifices of your peace-offerings; and they shall be to you for a memorial before your God: I am Jehovah your God.

11 And it came to pass in the second year, in the second month, on the twentieth day of the month, that the cloud was taken up from over the tabernacle of the testimony.

12 And the children of Israel set forward according to their journeys out of the wilderness of Sinai; and the cloud abode in the wilderness of Paran.

13 And they first took their journey according to the commandment of Jehovah by Moses.

14 And in the first [place] the standard of the camp of the children of Judah set forward according to their hosts: and over his host was Nahshon the son of Amminadab.