Sayyiduna Miqdam bin Ma'dikarib رضي الله عنه narrates that water was brought to the Messenger of Allah صلى الله عليه وسلم, so he performed ablution three times each, then wiped his head and wiped both his ears from the front and the back.
Hadith Referenceالمنتقى ابن الجارود / كتاب الطهارة / 74
Hadith Gradingغلام مصطفےٰ ظهير امن پوري:إسناده حسن