Abu Dawud
Purification (Kitab Al-Taharah)
Book Number: 001 / Hadith Number: 95
Narated By Umm Umarah : Habib al-Ansari reported: I heard Abbad ibn Tamim who reported on the authority of my grandmother, Umm Umarah, saying: The Prophet (pbuh) wanted to perform ablution. A vessel containing 2/3 mudd of water was brought to him.