Sayyiduna Jabir (may Allah be pleased with him) narrates: A man from the Ansar came to the Prophet (peace and blessings be upon him) and mentioned a guest before the Prophet (peace and blessings be upon him). The Prophet (peace and blessings be upon him) ordered that he be given half a wasq of barley. They began eating from it, and they kept eating it for a period of time. Then one day they took it and measured it, in order to see how much was left. Then, shortly afterwards, it ran out. That man came to the Prophet (peace and blessings be upon him) and mentioned this to him. The Prophet (peace and blessings be upon him) said: "Did you measure it? If you had not measured it, it would have remained for such and such a period (the narrator is unsure; perhaps the words are:) it would have remained for your whole life."
Al-Bazzar recorded it; its chain contains a narrator, Muhammad bin Abi Layla, and he is thiqah (trustworthy), yet there is weakness in him.