al-Hasan bin 'Ali al-Halwani الحسن بن علي الخلال الحلواني · The Chapters on Business Transactions

"The Messenger of Allah (ﷺ) forbade meeting traders on the way."

"I came to the Messenger of Allah (ﷺ), during one of his 'Umrah at Marwah and said: 'O Messenger of Allah, I am a woman who buys and sells. When I want to buy something, I state a price less than I want to pay, then I raise it gradually until it reaches the price I want to pay. And when I want to sell something, I state a price more than I want, then I lower it until it…

"Zaid bin Thabit told me that the Messenger of Allah (ﷺ) gave a concession regarding the sale of the estimated harvest of 'Araya return for dried dates." (Sahih) Yahya (one of the narrators) said: "The 'Araya is when a man purchases dates on the trees for food that his family has that is ripe, by estimating them (the dates)."