Abu Da'ud أبو داود السجستاني الأزدي · The Book of Financial Transactions

"Do not urge someone to cancel a sale he has already agreed upon so as to sell him your own goods, unless he bys or changes his mind."

"At the time of the Messenger of Allah, a ma suffered loss of some fruit that he had purchased, and his debts increased. The Messenger of Allah said: 'give him charity.' So the people gave him charity, but that was not enough to pay of his debts. The Messenger of Allah said: "Take what you find but you have no right to or than that.""