(3) باب نَدْبِ مَنْ حَلَفَ يَمِينًا فَرَأَى غَيْرَهَا خَيْرًا مِنْهَا أَنْ يَأْتِيَ الَّذِي هُوَ خَيْرٌ وَيُكَفِّرَ عَنْ يَمِينِهِ
Abu Musa reported:
We walked on foot and came to Allah's Apostle (may peace he upon him) asking him to provide us with mounts. The rest of the hadith is the same.
Reference: Sahih Muslim 1649 h
In-book reference: Book 27, Hadith 17
USC-MSA web (English) reference(deprecated numbering scheme): Book 15, Hadith 4051