Bamidbar 10:2-4

Orthodox Jewish Bible

² Make thee two tzotzerot (trumpets) of silver; of a whole piece shalt thou make them; that thou mayest use them for the calling of the Edah, and for the setting out of the machanot.

³ And when they shall sound them, Kol HaEdah shall assemble themselves to thee at the entrance of the Ohel Mo’ed.

⁴ And if they sound but with one, then the Nasi’im, which are heads of Yisroel’s thousands, shall gather themselves unto thee.