Sayyidah al-Rubayyi' bint Mu'awwidh (may Allah be pleased with her) said: I helped the Prophet (peace and blessings be upon him) perform ablution. I brought him (peace and blessings be upon him) a vessel that held one mudd, or one mudd and three (measures), of water, and he (peace and blessings be upon him) said: "Pour." So he (peace and blessings be upon him) performed ablution, wiped the front of his head, and wiped the outer and inner parts of his ears.
Hadith Referenceالمعجم الكبير للطبراني / مسند النساء / 21052