Musnad Ahmad 33:708

Yunus narrated to us, Fulayh narrated to us, from Sa’id ibn al-Harith—or Ibn Abi al-Harith—from Jabir ibn Abdullah, who said: The Messenger of Allah (peace and blessings of Allah be upon him) and a man from his companions entered upon a man from the Ansar in his garden while he was diverting water. He said: "Do you have any water that has spent the night in a waterskin? If not, we will drink directly from the source." He said: "Yes, O Messenger of Allah." He then went with him to a trellis, milked a sheep for him, and poured over it water that had spent the night in a waterskin. The Messenger of Allah (peace and blessings of Allah be upon him) drank and gave his companion to drink.