"Whoever takes an oath to cut off the ties of kinship, or to do something that is not right, the fulfillment of his vow is not to do that."  

قَالَ رَسُولُ اللَّهِ ﷺ مَنْ حَلَفَ فِي قَطِيعَةِ رَحِمٍ أَوْ فِيمَا لاَ يَصْلُحُ فَبِرُّهُ أَنْ لاَ يَتِمَّ عَلَى ذَلِكَ  

"Whoever swears an oath then sees that something else is better than it, let him not do it, and his leaving it is the expiation for it. "  

أَنَّ النَّبِيَّ ﷺ قَالَ مَنْ حَلَفَ عَلَى يَمِينٍ فَرَأَى غَيْرَهَا خَيْرًا مِنْهَا فَلْيَتْرُكْهَا فَإِنَّ تَرْكَهَا كَفَّارَتُهَا