A man who witnesses food being measured in front of him

Sayyiduna Abdullah bin Umar (may Allah be pleased with them both) was asked whether, if a man has seen grain being measured, it is necessary to measure it again before buying it. He said that it is necessary to measure it again before buying it.

Mutarrif said: I asked al-Sha'bi: "I was present while some grain was being measured. May I buy it without measuring it?" He said: "Every transaction requires its own measuring."

Ziyad said: I asked Sa'id bin al-Musayyib: "If a man buys grain by measuring it, is it all right for another man to buy it relying on his measuring?" He said: "No, rather it must be measured in your presence."

Maymun al-Qannad said: I asked Sa'id bin al-Musayyib: "A man buys al-Hashimiyyah and I watch it being weighed. May I buy it by that same weight?" He said: "It used to be said: That is the usury (riba) that has mingled with measure and weight."

Khalid bin Abd al-Rahman al-Sulami said: A man arrived with baskets of dates, and another man bought them. He measured out one basket from them, then wanted to take them according to its measure, and al-Hasan considered that disliked.

Al-Hasan said: If a man has watched grain being measured and wants to buy it, it must be measured again.

Muhammad bin Sirin was asked about a man who bought grain while another was with him. The other says: "I have witnessed the sale and the taking of possession," and then wants to buy it at a profit to the first: may he buy it by that same measure? He said: It must be measured again before it is sold the second time, so that any surplus is his and any shortfall falls on him.