If you sound it only once, the leaders and the heads of the multitude of Israel shall come to you
Other versions
King James Version
And if they blow but with one trumpet, then the princes, which are heads of the thousands of Israel, shall gather themselves unto thee.English Standard Version
But if they blow only one, then the chiefs, the heads of the tribes of Israel, shall gather themselves to you.New International Version
If only one is sounded, the leaders-the heads of the clans of Israel-are to assemble before you.