Muhammad bin 'Uthman bin Khalid محمد بن عثمان بن خالد · The Chapters on Business Transactions

"I said: 'O Messenger of Allah, a man is asking me to sell him something that I do not possess; Shall I sell it to him?' He said: 'Do not sell what is not with you."'

"The Messenger of Allah (ﷺ) forbade the Muhaqalah and the Muzabanah."