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:10124a –
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السيوطي:١٠١٢٤a –

"الإِضْرار في الوَصيِة من الكبائر".  

ابن جرير، وابن أَبي حاتم، [ق] البيهقى في السنن عن ابن عباس، وَصَحَّحَ [ق] البيهقى في السنن وَقْفَة

See similar narrations below:

Collected by Bayhaqī, Suyūṭī
bayhaqi:12586 – Abū al-Ḥusayn b. Bishrān al-ʿAdl Bibaghdād

[Machine] On the authority of the Prophet ﷺ , he said, "Harming others in a will is one of the major sins."  

البيهقي:١٢٥٨٦ – أَخْبَرَنَا أَبُو الْحُسَيْنِ بْنُ بِشْرَانَ الْعَدْلُ بِبَغْدَادَ ثنا أَبُو الْحَسَنِ عَلِيُّ بْنُ مُحَمَّدٍ الْمِصْرِيُّ إِمْلَاءً فِي الْمُحَرَّمِ سَنَةَ تِسْعٍ وَثَلَاثِينَ وَثَلَاثِمِائَةٍ ثنا بَكْرُ بْنُ سَهْلٍ ثنا عَبْدُ اللهِ بْنُ يُوسُفَ ثنا عُمَرُ بْنُ الْمُغِيرَةِ ثنا دَاوُدُ بْنُ أَبِي هِنْدَ عَنْ عِكْرِمَةَ عَنِ ابْنِ عَبَّاسٍ

عَنِ النَّبِيِّ ﷺ قَالَ الْإِضْرَارُ فِي الْوَصِيَّةِ مِنَ الْكَبَائِرِ