God now gently rebuked Aaron and Miriam for their transgression, and did not give vent to His wrath until He had shown them their sin. This was an example to man never to show anger to his neighbor before giving his reason for his anger. The effects of God's wrath were shown as soon as He had departed from them, for while He was with them, His mercy exceeded His anger, and nothing happened to them, but when He was not long with them, punishment set in.
Both Aaron and Miriam became leprous, for this is the punishment ordained for those who speak ill of their neighbors. Aaron's leprosy, however, lasted for a moment only, for his sin had not been as great as that of his sister, who started the talk against Moses. His disease vanished as soon as he looked upon his leprosy. Not so with Miriam.
Aaron in vain tried to direct his eyes upon her leprosy and in this way to heal her, for in her case the effect was the reverse; as soon as he looked upon her the leprosy increased, and nothing remained but to call for Moses' assistance, who was ready to give it before being called upon. Aaron thereupon turned to his brother with the following words: "Think not that the leprosy is on Miriam's body only, it is as if it were on the body of our father Amram, of whose flesh and blood she is."
Aaron did not, however, try to extenuate their sin, saying to Moses: "Have we, Miriam and I, ever done harm to a human being?" Moses: "No." Aaron: "If we have done evil to no strange people, how then canst thou believe that we wished to harm thee? For a moment only did we forget ourselves and acted in an unnatural way toward our brother. Shall we therefore lose our sister?
If Miriam's leprosy doth not now vanish, she must pass all her life as a leper, for only a priest who is not a relative by blood of the leper may under certain conditions declare her clean, but all the priests, my sons and I, are her relatives by blood. The life of a leper is as of one dead, for as a corpse makes unclean all that comes in contact with it, so too the leper. Alas!" so Aaron closed his intercession, "Shall our sister, who was with us in Egypt, who with us intoned the song at the Red Sea, who took upon herself the instruction of the women while we instructed the men, shall she now, while we are about to leave the desert and enter the promised land, sit shut out from the camp?"