Numbers 10:2-4

New King James Version

² “Make two silver trumpets for yourself; you shall make them of hammered work; you shall use them for ^(A)calling the congregation and for directing the movement of the camps. ³ When ^(B)they blow both of them, all the congregation shall gather before you at the door of the tabernacle of meeting. ⁴ But if they blow only one, then the leaders, the ^(C)heads of the divisions of Israel, shall gather to you.