Psalm 106:16
They were envious of Moses in the camp, and of Aaron, the holy one of the LORD.
Exodus 28:36
"You are to make a medallion of pure gold, and engrave on it "Holy to the LORD,' like the engravings of a signet.
Leviticus 21:6-8
They are to be holy to their God. They are not to defile the name of their God, because they're the ones who bring the offerings of the LORD made by fire the food of their God so they are to be holy.
Leviticus 21:10-12
"The high priest among his relatives whose head has been anointed with oil and who has been consecrated to put on the priestly clothing is not to let his hair hang loose or to tear his clothes.
Numbers 16:1-50
Now Izhar's son Korah, the grandson of Kohath, a descendant of Levi, along with Eliab's sons Dathan and Abiram, and Peleth's son On, a descendant of Reuben, took charge