Musnad Ahmad 32:1950

Muhammad ibn Ja'far narrated to us, Shu'bah narrated to us, and Hajjaj, he said: Shu'bah narrated to me, he said: I heard Qatadah narrating, he said: I heard Anas ibn Malik saying: "The Prophet, peace and blessings of Allah be upon him, used to love pumpkin." He said: "So food was brought to him" — or he was invited to it —. Anas said: "So I began to follow it, and I placed it before him because I knew that he loved it."