Leviticus 21:1
The LORD told Moses, "Speak to the priests, Aaron's sons, and tell them that no priest is to defile himself on account of the dead among his people,
Ezekiel 44:25
They are not to come in contact with a dead body, so they don't defile themselves, except in the case of their father, mother, son, daughter, brother, or for an unmarried sister, on whose behalf they may defile themselves.
Leviticus 10:6-7
Then Moses told Aaron and his sons Eleazar and Ithamar, "You are not to loosen the hair of your head and you are not to rend your clothes. That way, you won't die and wrath won't come on the entire congregation. Your brothers and the assembly of Israel will mourn because of the fire that the LORD kindled.
Leviticus 21:11
He is not to come near any dead body whether the deceased is his father or his mother so as not to defile himself.
Numbers 19:14
"This is the procedure to follow when a man dies in his tent: Everyone who enters the tent and everyone in it is to remain unclean for seven days.
Leviticus 19:28
"You are not to make incisions in your flesh on account of the dead nor submit to cuts or tattoos. I am the LORD.
Numbers 19:16
Whoever is out in an open field and touches the body of someone who was killed by a sword, or a dead body, or someone's bones, or a grave, he is to be considered unclean for seven days.
Hosea 5:1
"Hear this, priests, pay attention, house of Israel, listen, royal family! For judgment is coming your way, because you have been a trap to Mizpah, a snare spread out on Mount Tabor.
Malachi 2:1
Now this commandment is for you priests:
Malachi 2:4
"You will know that I sent this commandment to you in order to continue my covenant with Levi," says the LORD of the Heavenly Armies.