Caution: Translations of Quran and Ḥadīth may lead to possible misapplications and misinterpretations. This site is intended for students of sacred knowledge that are proficient in comprehending classical Arabic and have a strong foundation in Islamic sciences. Also note that religious injunctions rely on several aspects beyond what one may glean through reading individual aḥādīth.
Qurʾān Bukhārī Muslim Nasāʾī Abū Dāwūd Tirmidhī Ibn Mājah Mālik Aḥmad Dārimī Ḥākim Ibn Ḥibbān Ṭabarānī Nasāʾī's Kubrá Bayhaqī al-Luʾluʾ wa-al-Marjān Ibn Rajab's Fifty Riyāḍ al-Ṣāliḥīn Aḥmad's Zuhd Suyūṭī
suyuti:21415a –
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السيوطي:٢١٤١٥a –

"مَنْ حَلَفَ عَلَى أَحَد بِيَمِين وَهُوَ يَرَى أَنَّهُ سَيَبَرُّ بِهِ فَلَمْ يَفْعَلْ فَإِنَّمَا إِثْمُهُ عَلَى الَّذِي لَمْ يَبَرَّهُ".  

[ق] البيهقى في السنن وضعَّفه، عن أبي هريرة

See similar narrations below:

Collected by Bayhaqī
bayhaqi:19891 – Abū Bakr b. al-Ḥārith al-Faqīh > ʿAlī b. ʿUmar al-Ḥāfiẓ > ʿAlī b. al-Ḥasan b. Hārūn b. Rustum > Muḥammad b. ʿAbd al-Malik al-Daqīqī > Yazīd b. Hārūn > Baqiyyah > Isḥāq b. Mālik al-Ḥaḍramī > ʿIkrimah > Abū Hurayrah

[Machine] On the authority of the Prophet ﷺ , he said: "Whoever swears an oath to someone while knowing that he will not fulfill it, then the sin of that oath is upon the one who did not fulfill it."  

البيهقي:١٩٨٩١ – أَخْبَرَنَا أَبُو بَكْرِ بْنُ الْحَارِثِ الْفَقِيهُ أنبأ عَلِيُّ بْنُ عُمَرَ الْحَافِظُ ثنا عَلِيُّ بْنُ الْحَسَنِ بْنِ هَارُونَ بْنِ رُسْتُمَ ثنا مُحَمَّدُ بْنُ عَبْدِ الْمَلِكِ الدَّقِيقِيُّ ثنا يَزِيدُ بْنُ هَارُونَ ثنا بَقِيَّةُ ثنا إِسْحَاقُ بْنُ مَالِكٍ الْحَضْرَمِيُّ عَنْ عِكْرِمَةَ عَنْ أَبِي هُرَيْرَةَ ؓ

عَنِ النَّبِيِّ ﷺ قَالَ مَنْ حَلَفَ عَلَى أَحَدٍ بِيَمِينٍ وَهُوَ يَرَى أَنَّهُ سَيَبَرُّهُ فَلَمْ يَفْعَلْ فَإِنَّمَا إِثْمُهُ عَلَى الَّذِي لَمْ يَبَرَّهُ