Numbers 12In Numbers 12, Miriam and Aaron together "speak against" Moses:
1 And Miriam and Aaron spake against Moses because of the Ethiopian woman whom he had married: for he had married an Ethiopian woman. 2 And they said, Hath the Lord indeed spoken only by Moses? hath he not spoken also by us? And the Lord heard it. (KJV)
And yet the punishment appears to fall on Miriam alone:
10 And the cloud departed from off the tabernacle; and, behold, Miriam became leprousMiriam became leprous, white as snow: and Aaron looked upon MiriamAaron looked upon Miriam, and, behold, she was leprousshe was leprous. 11 And Aaron said unto Moses, Alas, my lord, I beseech thee, lay not the sin upon usus, wherein wewe have done foolishly, and wherein wewe have sinned. 12 Let her not be as one deadLet her not be as one dead, of whom the flesh is half consumed when he cometh out of his mother's womb. 13 And Moses cried unto the LORD, saying, Heal herher now, O God, I beseech thee. 14 And the LORD said unto Moses, If her father had but spit in herher face, should she not be ashamed seven days? let herher be shut out from the camp seven days, and after that let her be received in again. 15 And Miriam was shut outMiriam was shut out from the camp seven days:... (KJV)
Why does God punish Miriam only, and not Miriam and Aaron?