Sayyidah al-Rubayyi' bint Mu'awwidh bin Afra (may Allah be pleased with her) related that she saw the Messenger of Allah (peace and blessings be upon him) performing ablution. She said: "He (peace and blessings be upon him) wiped the front and back of his head, and his temples and ears, a single time."
Hadith Referenceالمعجم الكبير للطبراني / مسند النساء / 21059