Ubaidullah bin 'Umar bin Hafs عبيد الله بن عمر بن حفص بن عاصم · The Chapters on Business Transactions

the Prophet (ﷺ) forbade selling Hablul-Habalah.

"There are three to whom Allah will not speak on the Day of Resurrection, nor will He look at them or purify them, and theirs will be a painful torment: A man who has surplus water in the desert but refuses to give any to a wayfarer; a man who sells a product to a man after 'Asr and swears by Allah that he bought it for such and such amount, and he believes him, when that is not the…

"The Messenger of Allah (ﷺ) passed by a man who was selling food. He put his hand in it and saw that there was something wrong with it. The Messenger of Allah (ﷺ) said, 'He is not one of us who cheats."'

'(Sell) silver for silver, gold for gold, barley for barley, wheat for wheat, like for like."