Abu Hayyah relates: I saw Sayyiduna Ali (may Allah be pleased with him) performing ablution. He washed his palms and cleaned them, then rinsed his mouth three times and drew water into his nose three times, and washed his face and forearms three times, and wiped his head. Then he washed his feet including the ankles. Then he stood up, took the water left over from his ablution and drank it while standing. Then he said: I wanted to show you what the ablution of the Prophet (peace and blessings be upon him) was like.
Hadith Referenceالسنن الكبرى للبيهقي / كتاب الطهارة / 353