Musannaf Ibn Abi Shaybah

It is narrated from Hazrat Abu Qahzam that he said: A pouch was brought to Ibn Ziyad in which there were grains of wheat the size of date stones. And this pouch was found in the house of some members of the family of Kisra, and with it was this inscription: This is the produce of such-and-such a time, meaning it was produced in that era in which Allah was obeyed.