Ezra 2:62
these have sought their register among those reckoning themselves by genealogy, and they have not been found, and they are redeemed from the priesthood,
Numbers 3:10
'And Aaron and his sons thou dost appoint, and they have kept their priesthood, and the stranger who cometh near is put to death.'
Leviticus 21:21-23
No man in whom is blemish (of the seed of Aaron the priest) doth come nigh to bring near the fire-offerings of Jehovah; blemish is in him; the bread of his God he doth not come nigh to bring near.
Numbers 16:39-40
And Eleazar the priest taketh the brazen censers which they who are burnt had brought near, and they spread them out, a covering for the altar --
Numbers 18:7
and thou, and thy sons with thee, do keep your priesthood, for everything of the altar, and within the vail, and ye have served; a service of gift I make your priesthood; and the stranger who is coming near is put to death.'
Ezekiel 44:10-14
but -- the Levites who have gone far off from me, in the wandering of Israel when they went astray from Me after their idols, and they have borne their iniquity.