Musnad Ahmad 31:421

Muhammad ibn Ja‘far and Rawh narrated to us, they said: Sa‘id and ‘Abd al-Wahhab narrated to us, from Sa‘id, from Qatadah, from Abu ‘Isa—‘Abd al-Wahhab said in his narration: from Abu ‘Isa al-Harithi—from Abu Sa‘id al-Khudri, who said: "The Messenger of Allah, may Allah bless him and grant him peace, forbade that a man should drink while standing."