Musnad Ahmad 583 — Musnad of Ali ibn Abi Talib

Nuzail bin Sabrah says that water was brought to Sayyiduna Ali (may Allah be pleased with him) in a jug while he was in the courtyard of the mosque. He took a handful of water, rinsed his mouth with it, put water in his nose, wiped his face, passed his wet hand over his arms and head, then while standing, drank that water and said: "This is the ablution of a person who is not without ablution, but already has ablution, and I saw the Prophet (peace and blessings be upon him) doing it in this way."