Abu Zara' bin 'Amr /Harm أبو زرعة بن عمرو/هرم · The Book of Financial Transactions

"The Messenger of Allah forbade Muzabanah, which refers to when a man sells the dates of his grove while they are still on the trees, for a measure of dry on the tree, for a measure of dry dates, estimating the amount( of dates on the trees). Or, if it is grapes, he sells them when they are still on the vines, for a measure of raisins, estimating the amount (of grapes on the vines). Or if it is grain…