Musnad Abu Ya'la al-Mawsili 115:357

Ubayd Allah narrated to us, Khalid narrated to us, Sa'id narrated to us, from Qatadah, who said: Anas ibn Malik said: The Prophet of Allah (may Allah bless him and grant him peace) said: "There are seen in it pitchers of gold and silver, equal to the number of the stars of the sky." Abu Sa'id said: Meaning his Hawd (Cistern).