Musnad Ahmad 799:165

'Abd al-Samad and 'Affan narrated to us, they said: Hammad ibn Salamah narrated to us, al-Ash'ath ibn 'Abd al-Rahman al-Jarmi informed us, from his father, from Samurah ibn Jundub, that a man said: The Messenger of Allah (peace and blessings of Allah be upon him) said: "I saw as if a bucket was lowered from the sky. Abu Bakr came and took hold of its two handles, and he drank from it a weak drink." 'Affan said: "And in it is weakness." "Then 'Umar came and took hold of its two handles, and he drank until he was satiated. Then 'Uthman came and took hold of its two handles and drank, and it became active for him, and some of it splashed upon him."