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
bayhaqi:16355 – Abū Saʿīd b. Abū ʿAmr > Abū al-ʿAbbās Muḥammad b. Yaʿqūb > al-Ḥasan b. ʿAlī b. ʿAffān > Yaḥyá b. Ādam > al-Ḥasan b. Ṣāliḥ > ʿAlī b. Abū Ṭalḥah > al-Qāsim b. ʿAbd al-Raḥman > ʿAbdullāh b. Masʿūd

[Machine] Whoever has a covenant or treaty, his ransom shall be the ransom of the Muslim. This is non-negotiable and non-transferable.  

البيهقي:١٦٣٥٥ – أَخْبَرَنَا أَبُو سَعِيدِ بْنُ أَبِي عَمْرٍو ثنا أَبُو الْعَبَّاسِ مُحَمَّدُ بْنُ يَعْقُوبَ ثنا الْحَسَنُ بْنُ عَلِيِّ بْنِ عَفَّانَ ثنا يَحْيَى بْنُ آدَمَ ثنا الْحَسَنُ بْنُ صَالِحٍ عَنْ عَلِيِّ بْنِ أَبِي طَلْحَةَ عَنِ الْقَاسِمِ بْنِ عَبْدِ الرَّحْمَنِ عَنْ عَبْدِ اللهِ بْنِ مَسْعُودٍ ؓ قَالَ

مَنْ كَانَ لَهُ عَهْدٌ أَوْ ذِمَّةٌ فَدِيَتُهُ دِيَةُ الْمُسْلِمِ هَذَا مُنْقَطِعٌ وَمَوْقُوفٌ