Musnad Ahmad 32:868

Muhammad ibn Ja'far narrated to us, Shu'bah narrated to us, and Hajjaj narrated to us, he said: Shu'bah narrated to me, he said: I heard Qatadah narrating, he said: I heard Anas ibn Malik say: "The Messenger of Allah, peace and blessings of Allah be upon him, used to love *ad-duba*." Hajjaj said: [meaning] the gourd. He said: So food was brought—or he was invited to it—Anas said: So I began to follow it [the gourd] and place it before him, because I knew that he loved it.