"The Messenger of Allah said: 'If you swear an oath, offer expiation for your oath, then do that which is better.'" (Using translation from Nasāʾī 3783)
قَالَ لِي رَسُولُ اللهِ ﷺ «إِذَا حَلَفْتَ عَلَى يَمِينٍ فَكَفِّرْ عَنْ يَمِينِكَ ثُمَّ ائْتِ الَّذِي هُوَ خَيْرٌ»