Abdullah bin Umar (RA) reported Allahs Messenger ﷺ as saying: When two persons enter into a transac. tion, each one of them has the right to annul it so long as they are not separated, or their transaction gives one another (as a condition) the right of annulling, and if their transaction, has the right of annulling it the transaction becomes binding. Ibn Abi Umar made this addition that whenever he ( Ibn Umar (RA) ) entered into a transaction with a person with the intention of not breaking it, he walked a while and then returned to him.