Muwatta Malik #68
Purity
The Arabic includes the chain of narration (sanad) and the collector's commentary; the English translation shows the Prophet's words only.
حَدَّثَنِي يَحْيَى، عَنْ مَالِكٍ، عَنْ نَافِعٍ، أَنَّ عَبْدَ اللَّهِ بْنَ عُمَرَ، كَانَ يَأْخُذُ الْمَاءَ بِأَصْبُعَيْهِ لأُذُنَيْهِ .
Yahya related to me from Malik from Nafi that Abdullah ibn Umar
used two fingers to take water to his ears.
About Muwatta Malik
This hadith is #68 from Muwatta Malik, in the Book of Purity.