Sahih al-Bukhari 6625

Arabic

فَقَالَ رَسُولُ اللَّهِ صلى الله عليه وسلم ‏ "‏ وَاللَّهِ لأَنْ يَلِجَّ أَحَدُكُمْ بِيَمِينِهِ فِي أَهْلِهِ آثَمُ لَهُ عِنْدَ اللَّهِ مِنْ أَنْ يُعْطِيَ كَفَّارَتَهُ الَّتِي افْتَرَضَ اللَّهُ عَلَيْهِ ‏"‏‏.‏

English translation

Allah's Messenger (ﷺ) also said:"By Allah, if anyone of you insists on fulfilling an oath by which he may harm his family, he commits a greater sin in Allah's sight than that of dissolving his oath and making expiation for it

Reference: Sahih al-Bukhari 6625, Book of Oaths and Vows. English translation by Dr. Muhammad Muhsin Khan.