Sahih Bukhari

Narrated Jabir bin `Abdullah:I said, ""O Allah's Messenger (ﷺ)! We have slaughtered a young sheep of ours and have ground one Sa of barley. So, I invite you along with some persons."" So, the Prophet (ﷺ) said in a loud voice, ""O the people of the Trench! Jabir has prepared ""Sur"" so come along.""