‏الصيام : Hadeeth No:2618 Ibn 'Umar (Allaah be pleased with them) reported Allaah's Prophet (sallAllaahu alayhi wa sallam) as saying: Seek Lailat-ul-Qadr in the last week (of Ramadan)....

‏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....