Narrated `Abdullah bin Zaid: The Prophet performed ablution by washing the body parts twice.

Narrated Ibn `Abbas: The Prophet performed ablution by washing the body parts only once.

Narrated `Abdullah bin Zaid: Once Allah's Apostle came to us and we brought out water for him in a brass pot. He performed ablution thus: He washed his face thrice, and his forearms to the elbows twice, then passed his wet hands lightly over the head from front to rear and brought them to front again and washed his feet (up to the ankles).