Thematic Bible: The duties of a priest

And LORD said to Moses, Speak to the priests, the sons of Aaron, and say to them, There shall none defile himself for the dead among his people, except for his kin, who is near to him: for his mother, and for his father, and for his son, and for his daughter, and for his brother. And for his sister a virgin, who is near to him, who has had no husband, for her he may defile himself. read more.
He shall not defile himself, [who is] a chief man among his people, to profane himself. They shall not make baldness upon their head, neither shall they shave off the corner of their beard, nor make any cuttings in their flesh. They shall be holy to their God, and not profane the name of their God. For they offer the offerings of LORD made by fire, the bread of their God. Therefore they shall be holy. They shall not take a woman who is a harlot, or profane, neither shall they take a woman put away from her husband, for he is holy to his God. Thou shall sanctify him therefore, for he offers the bread of thy God. He shall be holy to thee, for I LORD, who sanctify you, am holy. And the daughter of any priest, if she profanes herself by playing the harlot, she profanes her father. She shall be burnt with fire. And he who is the high priest among his brothers, upon whose head the anointing oil is poured, and who is consecrated to put on the garments, shall not let the hair of his head go loose, nor tear his clothes, neither shall he go in to any dead body, nor defile himself for his father, or for his mother, neither shall he go out of the sanctuary, nor profane the sanctuary of his God, for the crown of the anointing oil of his God is upon him. I am LORD. And he shall take a wife in her virginity. A widow, or one divorced, or a profane woman, a harlot, these he shall not take, but he shall take to wife a virgin of his own people. And he shall not profane his seed among his people, for I am LORD who sanctifies him.

And now, O ye priests, this commandment is for you. If ye will not hear, and if ye will not lay it to heart, to give glory to my name, says LORD of hosts, then I will send the curse upon you, and I will curse your blessings. Yea, I have cursed them already, because ye do not lay it Behold, I will rebuke your seed, and will spread dung upon your faces, even the dung of your feasts, and ye shall be taken away with it. read more.
And ye shall know that I have sent this commandment to you, that my covenant may be with Levi, says LORD of hosts. My covenant of life and peace was with him. And I gave them to him that he might fear, and he feared me, and stood in awe of my name. The law of truth was in his mouth, and unrighteousness was not found in his lips. He walked with me in peace and uprightness, and turned many away from iniquity. For the priest's lips should keep knowledge, and they should seek the law at his mouth. For he is the messenger of LORD of hosts.