TSK
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"Bring Aaron your brother, and his sons with him, near to you 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.
The sons of Aaron the priest shall put fire on the altar, and lay wood in order on the fire;
No one shall be in the Tent of Meeting when he enters to make atonement in the Holy Place, until he comes out, and has made atonement for himself and for his household, and for all the assembly of Israel.
Now there was a certain man of Ramathaim Zophim, of the hill country of Ephraim, and his name was Elkanah, the son of Jeroham, the son of Elihu, the son of Tohu, the son of Zuph, an Ephraimite:
These were the divisions of the sons of Aaron. The sons of Aaron: Nadab and Abihu, Eleazar and Ithamar.
My sons, don't be negligent now; for Yahweh has chosen you to stand before him, to minister to him, and that you should be his ministers, and burn incense."