Nu'aym bin Abdullah al-Mujmir says: I saw Sayyiduna Abu Hurayrah (may Allah be pleased with him) performing ablution. He washed his face and performed the ablution completely, then he washed his right arm until he went on into the upper arm, then he washed his left arm on into the upper arm, then he wiped his head, then he washed his right foot up to the shin, then washed his left foot up to the shin, then said: This is how I saw the Messenger of Allah (peace and blessings be upon him) performing ablution.
Hadith Referenceالسنن الكبرى للبيهقي / كتاب الطهارة / 362