Sahih Muslim , Book 15, Hadith 4055 (USC-MSA)

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."

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 ‏" ‏ ‏.‏

sunnah.com