Hadith 13:4
Narrated 'Abdur-Rahman bin Samura (RA):
Allah's Messenger (ﷺ) said: "When you swear an oath and then consider something else to be better than it, make atonement for your oath and do the thing that is better." [Agreed upon]. A wording of al-Bukhari has: "Do the thing that is better and make atonement for your oath." In a narration by Abu Dawud: "Make atonement for your oath, then do the thing that is better." [The chains of narrators of both Ahadith are Sahih (authentic)].
وَعَنْ عَبْدِ اَلرَّحْمَنِ بْنِ سَمُرَةٍ - رضى الله عنه - قَالَ: قَالَ رَسُولُ اَللَّهِ - صلى الله عليه وسلم -{ وَإِذَا حَلَفْتَ عَلَى يَمِينٍ, فَرَأَيْتُ غَيْرَهَا خَيْراً مِنْهَا, فَكَفِّرْ عَنْ يَمِينِكَ, وَائْتِ اَلَّذِي هُوَ خَيْرٌ" } مُتَّفَقٌ عَلَيْهِ وَفِي لَفْظٍ لِلْبُخَارِيِّ: { " فَائِت اَلَّذِي هُوَ خَيْرٌ, وَكَفِّرْ عَنْ يَمِينِكَ" } وَفِي رِوَايَةٍ لِأَبِي دَاوُدَ: { " فَكَفِّرْ عَنْ يَمِينِكَ, ثُمَّ اِئْتِ اَلَّذِي هُوَ خَيْرٌ" } وَإِسْنَادُهَا صَحِيحٌ
Original Reference: Bulugh al-Maram 1377