Deuteronomy 18:5
For Yahweh your God has chosen him from [among] all your tribes to stand to minister in the name of Yahweh, he and his sons {forever}.
Deuteronomy 10:8
At that time Yahweh set apart the tribe of Levi to carry the ark of the covenant of Yahweh to stand {before} Yahweh, to serve him and to bless [the people] in his name until this day.
Deuteronomy 17:12
And the man who treats with contempt [so as] not to listen to the priest [who] [is] standing to minister on behalf of Yahweh your God or to the judge, that man shall die; so you shall purge the evil from Israel.
Exodus 28:1-14
"And bring near to you Aaron, your brother, and his sons with him from the midst of the {Israelites} to serve as priests for me--Aaron, Nadab and Abihu, Eleazar and Ithamar, the sons of Aaron.
Numbers 3:10
But you will count Aaron and his descendants; they will keep their priesthood, and the stranger who approaches will be put to death."
Numbers 16:5
And he said to Korah and to his entire company, saying, "[Tomorrow] morning Yahweh will make known who [is] his and [who] is holy, and he will bring him near to him, whomever he chooses he will bring near to him.
Numbers 16:9-10
[Is it] too little for you that the God of Israel set you apart from the community of Israel {to allow you to approach him} to do the work of the tabernacle of Yahweh, to stand {before} the community to serve them?
Numbers 17:5-9
And it will happen, the man whom I will choose, his staff will blossom, and so I will rid from upon myself the grumblings of the {Israelites}, who [are] grumbling against you."
Numbers 25:13
and it will be for him and his {offspring} after him a covenant of an eternal priesthood because he was jealous for his God and made atonement for the {Israelites}.'"