Sayyiduna Ibn Abbas (may Allah be pleased with them both) said: The Messenger of Allah (peace and blessings be upon him) performed tawaf, then came back and went to the Siqayah (the place where water was given to drink), and said: "Give me to drink of what the people drink from."
Hadith Referenceالمعجم الكبير للطبراني / باب العين / 12504