" The Messenger of Allah(s.a.w) died and we had a Shatr of barley. We ate from it as Allah willed, then I said to the slave girl: 'Measure it' so she measured it, and it was not long before it was gone." She said: "If we had left it alone then we could have eaten from it more than that." : "Shatr" means a small quantity of barley.
Jami` at-Tirmidhi Book 37, Hadith 53