Numbers 3:38-40

Douay-Rheims 1899 American Edition

³⁸ Before the tabernacle of the covenant, that is to say on the east side, shall Moses and Aaron camp, with their sons, having the custody of the sanctuary, in the midst of the children of Israel. What stranger soever cometh unto it, shall be put to death.

³⁹ All the Levites, that Moses and Aaron numbered according to the precept of the Lord, by their families, of the male kind from one month and upward, were twenty-two thousand.

⁴⁰ And the Lord said to Moses: Number the firstborn of the male sex of the children of Israel, from one month and upward, and thou shalt take the sum of them.