‏الزهد والرقائق‏ : Hadeeth No:7089 'A'isha reported: We the family of Muhammad (sallAllaahu alayhi wa sallam) used to spend (the whole) month in which we (did not need to) kindle the fire as (we had nothing to cook) ; we had only dates and water (to fill our bellies)....

‏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....