1Yahweh said to Moses, “Speak to the priests, the sons of Aaron, and say to them, ‘A priest shall not defile himself for the dead among his people, 2except for his relatives that are near to him: for his mother, for his father, for his son, for his daughter, for his brother, 3and for his virgin sister who is near to him, who has had no husband; for her he may defile himself. 4He shall not defile himself, being a chief man among his people, to profane himself.
5“‘They shall not shave their heads or shave off the corners of their beards or make any cuttings in their flesh. 6They shall be holy to their God, and not profane the name of their God, for they offer the offerings of Yahweh made by fire, the bread of their God. Therefore they shall be holy.
7“‘They shall not marry a woman who is a prostitute, or profane. A priest shall not marry a woman divorced from her husband; for he is holy to his God. 8Therefore you shall sanctify him, for he offers the bread of your God. He shall be holy to you, for I Yahweh, who sanctify you, am holy.
9“‘The daughter of any priest, if she profanes herself by playing the prostitute, she profanes her father. She shall be burned with fire.
10“‘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 hang loose, or tear his clothes. 11He must not go in to any dead body, or defile himself for his father or for his mother. 12He shall not 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 Yahweh.
13“‘He shall take a wife in her virginity. 14He shall not marry a widow, or one divorced, or a woman who has been defiled, or a prostitute. He shall take a virgin of his own people as a wife. 15He shall not profane his offspring among his people, for I am Yahweh who sanctifies him.’”
16Yahweh spoke to Moses, saying, 17“Say to Aaron, ‘None of your offspring throughout their generations who has a defect may approach to offer the bread of his God. 18For whatever man he is that has a defect, he shall not draw near: a blind man, or a lame, or he who has a flat nose, or any deformity, 19or a man who has an injured foot, or an injured hand, 20or hunchbacked, or a dwarf, or one who has a defect in his eye, or an itching disease, or scabs, or who has damaged testicles. 21No man of the offspring of Aaron the priest who has a defect shall come near to offer the offerings of Yahweh made by fire. Since he has a defect, he shall not come near to offer the bread of his God. 22He shall eat the bread of his God, both of the most holy, and of the holy. 23He shall not come near to the veil, nor come near to the altar, because he has a defect; that he may not profane my sanctuaries, for I am Yahweh who sanctifies them.’”
24So Moses spoke to Aaron, and to his sons, and to all the children of Israel.
Aaron was the son of Amram and Jochebed, the brother of Moses and Miriam. He was the first priest of the people of Israel. He was appointed by God to be a spokesman for Moses when Moses went before the Pharaoh of Egypt to demand that Pharaoh would release the people of Israel from slavery. When facing Pharaoh, it was Aaron who threw his rod before Pharaoh, which turned into a snake. He also assisted Moses in declaring various judgments on Pharaoh and the Egyptian people until finally the Pharaoh conceded to the demand.
Aaron was also present at Sinai when Moses received the Ten Commandments, but he also conceded to the creation of the Golden Calf by the Israelites during the time that Moses was on the mountain receiving the law of God.
Aaron was important for the development of the priesthood in Israel, and had two sons who died, and Eleazar and Ithamar succeeded him as priests. After his death, he was buried on Mt. Hor.
The preceding information is based on Herbert Lockyer, All the Men of the Bible, (Zondervan: Grand Rapids, MI, 1958) and All the Women of the Bible (Zondervan: Grand Rapids, MI, 1967), Who's Who in the Bible (Bonanza Books, New York, 1981), and Biographies of Bible Characters, People and Characters in the Bible.