Charles Ellicott Commentary Deuteronomy 9:20

"And Jehovah was very angry with Aaron to destroy him: and I prayed for Aaron also at the same time." — Deuteronomy 9:20 (ASV)

I prayed for Aaron also. —Jewish commentators ascribe the loss of Aaron’s two sons (Leviticus 10:1–2) partly to God’s anger at this time.