13. For all the firstborn are Mine. On the day that I slew all the firstborn in the land of Egypt, I consecrated for Myself all the firstborn in Israel, both man and beast; Mine they shall be. I am the Lord.
14. And the Lord said to Moses in the Wilderness of Sinai,
15. Number the sons of Levi by their fathers' houses and by families. Every male from a month old and upward you shall number.
16. So Moses numbered them as he was commanded by the word of the Lord.
17. These were the sons of Levi by their names: Gershon, Kohath, and Merari.
18. And these are the names of the sons of Gershon by their families: Libni and Shimei.