1Miriam and Aaron spoke against Moses because of the Cushite woman whom he had married; for he had married a Cushite woman. 2They said, “Has Yahweh indeed spoken only with Moses? Hasn’t he spoken also with us?” And Yahweh heard it.
3Now the man Moses was very humble, more than all the men who were on the surface of the earth. 4Yahweh spoke suddenly to Moses, to Aaron, and to Miriam, “You three come out to the Tent of Meeting!”
The three of them came out. 5Yahweh came down in a pillar of cloud, and stood at the door of the Tent, and called Aaron and Miriam; and they both came forward. 6He said, “Now hear my words. If there is a prophet among you, I, Yahweh, will make myself known to him in a vision. I will speak with him in a dream. 7My servant Moses is not so. He is faithful in all my house. 8With him, I will speak mouth to mouth, even plainly, and not in riddles; and he shall see Yahweh’s form. Why then were you not afraid to speak against my servant, against Moses?” 9Yahweh’s anger burned against them; and he departed.
10The cloud departed from over the Tent; and behold, Miriam was leprous, as white as snow. Aaron looked at Miriam, and behold, she was leprous.
11Aaron said to Moses, “Oh, my lord, please don’t count this sin against us, in which we have done foolishly, and in which we have sinned. 12Let her not, I pray, be as one dead, of whom the flesh is half consumed when he comes out of his mother’s womb.”
13Moses cried to Yahweh, saying, “Heal her, God, I beg you!”
14Yahweh said to Moses, “If her father had but spit in her face, shouldn’t she be ashamed seven days? Let her be shut up outside of the camp seven days, and after that she shall be brought in again.”
15Miriam was shut up outside of the camp seven days, and the people didn’t travel until Miriam was brought in again. 16Afterward the people traveled from Hazeroth, and encamped in the wilderness of Paran.
Aaron was the son of Amram and Jochebed, the brother of Moses and Miriam, and the first priest of Israel. God appointed Aaron to be Moses' spokesman in his audiences with the unnamed Pharaoh of Exodus. As a symbol of his office, Aaron received a magical rod. He turned the rod into a snake - the first in a series of signs, by which he and Moses hoped to persuade Pharaoh to let the Israelites leave Egypt. Aaron also used the rod to call down three of the plagues that followed this first sign (polluting the Nile, frogs and gnats). God also caused the rod to blossom and bear ripe almonds, as a sign that Aaron's descendants would inherit the priesthood.
God summoned Aaron to be present when Moses received the Ten Commandments. But Aaron did not stay on Sinai. Instead he agreed to oversee the casting of an idol (a golden calf) for the Israelites who had rebelled against the authority of the absent Moses.
Aaron was generally a supporter of Moses, but took him to task for his marrying a Cushite wife. For this God rebuked Aaron (and Miriam). His role as priest was critical when he made atonement for the Israelites and stayed the plague that had followed the rebellion of Dathan and Abiram. Exodus and Leviticus give a detailed account of the vestments and duties of Aaron and of his sons.
Aaron's elder sons, Nadab and Abihu, died early but the younger pair, Eleazar and Ithamar, succeeded him in the priesthood. When Aaron was a hundred and twenty three, God instructed him to go up onto Mt. Hor, where he died. Aaron figures prominently in Exodus, Leviticus, Deuteronomy and Numbers, and is named in other books of both Old and New Testaments.