Mine. God claimed the first-born, on account of having spared them, Exodus xii. 23. He requires that all males shall be redeemed, except those of the tribe of Levi, whom he claims as his peculiar portion, as the price of the redemption of those who were living in Egypt, when the destroying angel passed by. This honour was wholly gratuitous, though the Levites deserved to obtain a confirmation of it by their zeal, Exodus xxxii. 29., and Deuteronomy xxxiii. 9. God seems to have revealed to Moses the destination of Aaron's family, long before they were appointed to exercise the functions of the priesthood, Exodus xix. 22, 24, and xxiv. 1. (Calmet)

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