New Revised Standard Version
But if only one is blown, then the leaders, the heads of the tribes of Israel, shall assemble before you.

Contemporary English Version
But if just one is blown, only the twelve tribal leaders need to come together.

New American Bible
but when one of them is blown, only the tribal leaders, the heads of the clans of Israel, shall gather round you.

Douay-Rheims Bible
If thou sound but once, the princes and the heads of the multitude of Israel shall come to thee.

If thou sound but once, the princes and the heads of the multitude of Israel shall come to thee.

Numbers 1:4-16 And there shall be with you the princes of the tribes, and of the houses in their kindreds, . . .

Numbers 7:2 The princes of Israel and the heads of the families, in every tribe, who were the rulers of them who had been numbered, offered

Exodus 18:21 And provide out of all the people able men, such as fear God, in whom there is truth, and that hate avarice, and appoint of them rulers of thousands, and of hundreds, and of fifties, and of tens,

Deuteronomy 1:15 And I took out of your tribes men wise and honourable, and appointed them rulers, tribunes, and centurions, and officers over fifties, and over tens, who might teach you all things.