Sahih Muslim Book 23, Hadith Number 5069.

Chapter : Permissibility of eating soup and merit of eating pumpkin.

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.