Musannaf Ibn Abi Shaybah

It is narrated from Hazrat Amr bin Shu'aib that the governor of Ta'if wrote a letter to Hazrat Umar bin Khattab stating that the people who possess honey have withheld from us what they used to give to those before us. Hazrat Umar wrote to him that if they pay as much as they used to pay to the Messenger of Allah (peace and blessings be upon him), then collect it from them; otherwise, do not collect it. The narrator states that Hazrat Amr bin Shu'aib believed that they used to give one water-skin out of every ten water-skins.