Moshe chose able men out of all Yisra'el, and made them heads over the people, rulers of thousands, rulers of hundreds, rulers of fifties, and rulers of tens.
that the princes of Yisra'el, the heads of their fathers' houses, offered. These were the princes of the tribes. These are they who were over those who were numbered:
When you shall vow a vow to the LORD your God, you shall not be slack to pay it: for the LORD your God will surely require it of you; and it would be sin in you.