Abdullah bin Abi Najih عبد الله بن أبي نجيح · The Book of Financial Transactions

they used to buy and sell during the time of the Messenger of Allah at the top of the marketplace without measuring. The Messenger of Allah forbade them to sell it in the place where they had bought it until they moved it.

"Any man who pollinates a date-palm tree then sells it, the fruits of the tree are for the one who pollinated it, unless the purchaser stipulated otherwise."