And the Lord spake unto Moses Continued to speak unto him, and give him the reason of his appointing the Levites to minister to the priests and serve the tabernacle:
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"Behold, I have taken the Levites from among the children of Israel instead of all the firstborn who open the womb among the children of Israel; and the Levites shall be mine:
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for all the firstborn are mine. On the day that I struck down all the firstborn in the land of Egypt I made holy to me all the firstborn in Israel, both man and animal. They shall be mine. I am Yahweh."