‏البيوع : Hadeeth No:3660 Ibn Umar reported Allaah's Messenger (sallAllaahu alayhi wa sallam) as saying: There is no transaction between two persons entering a transaction until they separate, but only when there is an option to annul it....

‏الفضائل : Hadeeth No:5829 Abu Musa reported that Allaah's Prophet (sallAllaahu alayhi wa sallam) was asked such things which he disapproved and when they persisted on asking him he felt enraged and then said to the people: Ask me what you wish to ask. Thereupon a person said: Who is my father? He said: Your father is Hudhafa...