Sahih Muslim #4274 · The Book of Oaths

Sahih MuslimThis hadith is narrated on the authority of Suhail with the same chain of transmitters
Sahih Muslim · Book 27 · The Book of Oaths
Sahih Muslim · كتاب 27 · كتاب الأيمان
" He should expiate for (breaking) the vow and do that which is better."
وَحَدَّثَنِي الْقَاسِمُ بْنُ زَكَرِيَّاءَ، حَدَّثَنَا خَالِدُ بْنُ مَخْلَدٍ، حَدَّثَنِي سُلَيْمَانُ، - يَعْنِي ابْنَ بِلاَلٍ - حَدَّثَنِي سُهَيْلٌ، فِي هَذَا الإِسْنَادِ بِمَعْنَى حَدِيثِ مَالِكٍ ‏
"‏ فَلْيُكَفِّرْ يَمِينَهُ وَلْيَفْعَلِ الَّذِي هُوَ خَيْرٌ ‏"‏ ‏.‏
Reference : Sahih Muslim 4274In-book reference : Book 27, Hadith 21