Thomson(i)
16 Because they are solemnly given up to me from among the children of Israel; I have taken them for myself from among the children of Israel, instead of all the males who are the first born of their mothers.
17 Because every first born among the children of Israel, whether of man or beast, belongeth to me [on the day when I smote all the first born in the land of Egypt, I hallowed them for myself]
18 and I have taken the Levites instead of all the first born among the children of Israel,
19 and have given the Levites as a gift to Aaron and his sons, from among the children of Israel, to do the works of the children of Israel at the tabernacle of the testimony, and to make atonement for the children of Israel; therefore none among the children of Israel shall come near the Holies.