Selling Goods by Numbers and Estimate and Unknown Items

3. Ali ibn Ibrahim has narrated from his father from Ibn Abi ‘Umayr from Hammad from al-Halabiy who has said the following: “Abu ‘Abd Allah عليه السلام, was asked about walnuts that cannot be counted. The owner weighs a certain measurement, then counts the rest according to that measurement. He (the Imam) said, ‘It is not harmful.’”