Sahih Bukhari Volume 7, Book 65, Hadith Number 346.

Narrated By Anas : I was a young boy when I once was walking with Allah’s Apostle. Allah’s Apostle entered the house of his slave tailor and the latter brought a dish filled with food covered with pieces of gourd. Allah’s Apostle started picking and eating the gourd. When I saw that, I started collecting and placing the gourd before him. Then the slave returned to his work. Anas added: I have kept on loving gourd since I saw Allah’s Apostle doing what he was doing.