"The two parties to a transaction both have the choice so long as they both chosen to conclude the transaction." (Sahih )
Sunan an-Nasa'i Book 44, Hadith 17
← Previous Hadith The Messenger of Allah said: "The two parties to a transaction have the choice so long as they have not separated. If they are honest and open, their transaction will be blessed, but if they tell lies and conceal anything the blessing of their transaction will be lost."

Sunan an-Nasa'i Book 44, Hadith 16 Next Hadith → "Nafi narrated to me from Ibn 'Umar, tht the Messenger of Allah said: 'the two parties to a transaction both have the choice so long as they have not separated, or they have chosen." (Sahih )

Sunan an-Nasa'i Book 44, Hadith 18