Sahih
Muslim
صحيح مسلم
27
The Book of Oaths
كتاب الأيمان
Chapter 3: It is recommended for the one who swears an oath then sees that something else is better than it; To do that which is better and offer expiation for his oath
باب نَدْبِ مَنْ حَلَفَ يَمِينًا فَرَأَى غَيْرَهَا خَيْرًا مِنْهَا أَنْ يَأْتِيَ الَّذِي هُوَ خَيْرٌ وَيُكَفِّرَ عَنْ يَمِينِهِ
Sahih Muslim 1651 b
'Adi b. Hatim reported Allah's Messenger (ﷺ) as saying
He who took an oath, but he found something else better than that, should do that which is better and break his oath.وَحَدَّثَنَا عُبَيْدُ اللَّهِ بْنُ مُعَاذٍ، حَدَّثَنَا أَبِي، حَدَّثَنَا شُعْبَةُ، عَنْ عَبْدِ الْعَزِيزِ بْنِ رُفَيْعٍ، عَنْ تَمِيمِ بْنِ طَرَفَةَ، عَنْ عَدِيِّ بْنِ حَاتِمٍ، قَالَ قَالَ رَسُولُ اللَّهِ صلى الله عليه وسلم " مَنْ حَلَفَ عَلَى يَمِينٍ فَرَأَى غَيْرَهَا خَيْرًا مِنْهَا فَلْيَأْتِ الَّذِي هُوَ خَيْرٌ وَلْيَتْرُكْ يَمِينَهُ " .
Grade: Sahih