Musnad Abu Ya'la al-Mawsili 115:83

Ubayd Allah ibn Umar narrated to us, Harami narrated to us, Shu'bah narrated to us, from Qatadah, from Anas, who said: The Messenger of Allah (peace and blessings of Allah be upon him) used to like pumpkin. He said: So I saw him one day eating food that had pumpkin in it, and I began to bring it closer to him.