Exodus 28:1
And take you to you Aaron your brother, and his sons with him, from among the children of Israel, that he may minister to me in the priest's office, even Aaron, Nadab and Abihu, Eleazar and Ithamar, Aaron's sons.
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Exodus 29:1
And this is the thing that you shall do to them to hallow them, to minister to me in the priest's office: Take one young bullock, and two rams without blemish,
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Leviticus 8:1
And the LORD spoke to Moses, saying,
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