‏الأيمان : Hadeeth No:4054 Abu Huraira reported Allaah's Messenger (sallAllaahu alayhi wa sallam) as saying: He who took an oath and (later on) found another thing better than that, he should do that which is better, and expiate for the vow (broken by him)....

‏الصلاة : Hadeeth No:1122 Abu Huraira reported: I perceive as if I am looking at the Messenger of Allaah (sallAllaahu alayhi wa sallam) folding up a part of his cloth with another one....