He said: Abu Barzah, the companion of the Prophet (ﷺ), is to decide between me and you. They went to Abu Barzah in the corner of the army. They related this story to him.
He said: Do you agree that I make a decision between you on the basis of the decision of the Messenger of Allah (ﷺ)?
The Messenger of Allah (ﷺ) said: Both parties in a business transaction have an option (right) to annul it so long as they have not separated.
Hisham to Hassan said that Jamil said in his version: "I do not think that you separated."
In-book : Book 24, Hadith 42
English translation : Book 23, Hadith 3450