Musnad Ahmad 1153:1261

Al-Haytham ibn Jamil narrated to us, he said: Muhammad ibn Muslim narrated to us, he said: Abd al-Rahman ibn al-Qasim narrated to us, from his father, from Aisha: "That the Prophet, peace and blessings of Allah be upon him, entered upon a woman from the Ansar, and in the house was a hanging water skin. He inclined it and drank while he was standing."