Purification (Kitab Al-Taharah)
1/51. Chapter:
The Manner of The Prophet's Wudu'
Sunan Abi Dawud
حَدَّثَنَا مَحْمُودُ بْنُ خَالِدٍ، وَهِشَامُ بْنُ خَالِدٍ، - الْمَعْنَى - قَالاَ حَدَّثَنَا الْوَلِيدُ، بِهَذَا الإِسْنَادِ قَالَ وَمَسَحَ بِأُذُنَيْهِ ظَاهِرِهِمَا وَبَاطِنِهِمَا . زَادَ هِشَامٌ وَأَدْخَلَ أَصَابِعَهُ فِي صِمَاخِ أُذُنَيْهِ .
Another version says: He wiped his ears inside and outside. Hisham adds: He inserted his fingers in the ear-holes.
Reference : Sunan Abi Dawud 123In-book reference : Book 1, Hadith 123English translation : Book 1, Hadith 123