Sahih Muslim
The Book of Drinks (Kitab Al-Ashriba)
Book Number: 023 / Hadith Number: 5069
Anas b. Malik rdported that a tailor invited Allah's Messenger (may peace be upon him) to a feast. There has been an addition to this that Thabit said: I heard Anas saying that any meal that was prepared for me after that I tried that it should contain pumpkin.