It is narrated from Sayyidah al-Rubayyi' bint Mu'awwidh bin Afra (may Allah be pleased with her) that the Prophet (peace and blessings be upon him) came to her house and asked for water for ablution, and a vessel was brought which held one and a third, or one and a half, mudd of water by the mudd of the Prophet (peace and blessings be upon him). "He (peace and blessings be upon him) performed ablution: he washed his face, then washed his hand, wiped his head, and wiped the back of his head, reaching the middle of the head in every wipe."
Hadith Referenceالمعجم الكبير للطبراني / مسند النساء / 21061