(3) باب نَدْبِ مَنْ حَلَفَ يَمِينًا فَرَأَى غَيْرَهَا خَيْرًا مِنْهَا أَنْ يَأْتِيَ الَّذِي هُوَ خَيْرٌ وَيُكَفِّرَ عَنْ يَمِينِهِ
This hadith is narrated on the authority of Suhail with the same chain of transmitters (with these words):
" He should expiate for (breaking) the vow and do that which is better."
Reference: Sahih Muslim 1650 d
In-book reference: Book 27, Hadith 21
USC-MSA web (English) reference(deprecated numbering scheme): Book 15, Hadith 4055