Musnad Ahmad

Abdu Khair (may Allah have mercy on him) says that once Sayyiduna Ali (may Allah be pleased with him) taught us the way of ablution (wudu) of the Prophet (peace and blessings be upon him). So first he washed his hands, rinsed his mouth, put water into his nose, washed his face three times, washed both arms including the elbows three times, then again put his hands into the vessel and dipped his hand underneath it, then took it out and rubbed it on the other hand, and with both palms wiped the head once, and washed both feet including the ankles three times, then made a handful of water with his palm and drank a little from it, and said that the Prophet (peace and blessings be upon him) used to perform ablution in this manner.