The Messenger of Allah performed ablution and he wiped his head and his ears, inside and out.
Sunan Ibn Majah Book 1, Hadith 176
← Previous Hadith "The Prophet performed ablution, and he put his fingers in the (holes) inside of his ears."

Sunan Ibn Majah Book 1, Hadith 175 Next Hadith → "The Messenger of Allah said: 'The ears are part of the head.'"

Sunan Ibn Majah Book 1, Hadith 177