Sunan Ibn Majah, Book 1, Hadith 477 (In-Book) ⓘ
It was narrated from Miqdam bin Ma'dikarib that: The Messenger of Allah performed ablution and he wiped his head and his ears, inside and out.
حَدَّثَنَا هِشَامُ بْنُ عَمَّارٍ، حَدَّثَنَا الْوَلِيدُ، حَدَّثَنَا حَرِيزُ بْنُ عُثْمَانَ، عَنْ عَبْدِ الرَّحْمَنِ بْنِ مَيْسَرَةَ، عَنِ الْمِقْدَامِ بْنِ مَعْدِيكَرِبَ، أَنَّ رَسُولَ اللَّهِ ـ صلى الله عليه وسلم ـ تَوَضَّأَ فَمَسَحَ بِرَأْسِهِ وَأُذُنَيْهِ ظَاهِرَهُمَا وَبَاطِنَهُمَا .
also referenced under: Hadith 442 (Reference) & Volume 1, Book 1, Hadith 442 (DarusSalam)