Narrated by:Rubai' bint Mu'awwidh bin 'Afra' said
It was narrated that Rubai' bint Mu'awwidh bin 'Afra' said:"The Prophet performed ablution, and he put his fingers in the (holes) inside of his ears."
حَدَّثَنَا أَبُو بَكْرِ بْنُ أَبِي شَيْبَةَ، وَعَلِيُّ بْنُ مُحَمَّدٍ، قَالاَ حَدَّثَنَا وَكِيعٌ، عَنِ الْحَسَنِ بْنِ صَالِحٍ، عَنْ عَبْدِ اللَّهِ بْنِ مُحَمَّدِ بْنِ عَقِيلٍ، عَنِ الرُّبَيِّعِ بِنْتِ مُعَوِّذِ ابْنِ عَفْرَاءَ، قَالَتْ تَوَضَّأَ النَّبِيُّ ـ صلى الله عليه وسلم ـ فَأَدْخَلَ إِصْبَعَيْهِ فِي جُحْرَىْ أُذُنَيْهِ .
IbnMaja
The Book of Purification and its Sunnah • Hadith 441