Riyad-us-Saliheen 768
An-Nazzal bin Sabrah (May Allah be pleased with him) reported: 'Ali bin Abu Talib (May Allah be pleased with him) arrived at Bab Ar-Rahbah (in Kufah) and drank water in a standing posture. Then he said: "I saw Messenger of Allah (PBUH) doing what you have seen me doing."
[Al-Bukhari]