‏الزكاة : Hadeeth No:2287 Abu Huraira reported that the Messenger of Allaah (sallAllaahu alayhi wa sallam) had said: Richness does not lie in the abundance of (worldly) goods but richness is the richness of the soul (heart, self)....

‏الأيمان : Hadeeth No:4058 'Adi reported Allaah's Messenger (sallAllaahu alayhi wa sallam) as saying: When anyone amongst you takes an oath, but he finds (something) better than that he should expiate (the breaking of the oath), and do that which is better....