‏النذر : Hadeeth No:4034 'Uqba. b. Amir reported Allaah's Messenger (sallAllaahu alayhi wa sallam) as saying: The expiation of the (breach of) a vow is the same as that of the (breach of an oath)....

‏فضائل الصحابة‏ : Hadeeth No:5974 'A'isha reported: Never did I feel jealous of any wife amongst the wives of Allaah's Prophet (sallAllaahu alayhi wa sallam) as I feel in case of Khadija (though I had never seen her), for he praised her very often....