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:18193 – Abū al-Ḥusayn b. al-Faḍl al-Qaṭṭān> ʿAbdullāh b. Jaʿfar b. Darastawayh > Yaʿqūb b. Sufyān > Aḥmad b. Yūnus > Zuhayr > Ḥumayd > Anas > al-Hurmuzān Nazal > Ḥukm ʿUmar > ʿUmar

[Machine] "O Anas, I feel ashamed that I killed Bara' bin Malik and Majza'ah bin Thawr. So, he accepted Islam and made amends for them."  

البيهقي:١٨١٩٣ – أَخْبَرَنَا أَبُو الْحُسَيْنِ بْنُ الْفَضْلِ الْقَطَّانُ بِبَغْدَادَ أنبأ عَبْدُ اللهِ بْنُ جَعْفَرِ بْنِ دَرَسْتَوَيْهِ ثنا يَعْقُوبُ بْنُ سُفْيَانَ ثنا أَحْمَدُ بْنُ يُونُسَ ثنا زُهَيْرٌ ثنا حُمَيْدٌ ثنا أَنَسٌ أَنَّ الْهُرْمُزَانَ نَزَلَ عَلَى حُكْمِ عُمَرَ ؓ فَقَالَ

عُمَرُ ؓ يَا أَنَسُ أَسْتَحْيِي قَاتِلَ الْبَرَاءِ بْنِ مَالِكٍ وَمَجْزَأَةَ بْنِ ثَوْرٍ؟ فَأَسْلَمَ وَفَرَضَ لَهُ  

See similar narrations below:

Collected by Suyūṭī
suyuti:2-3702b – Ns n al-Hurmuzān Nzl ʿLá Ḥkm ʿMr
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السيوطي:٢-٣٧٠٢b –

"عن أنس أن الهُرْمُزَان نزل على حكم عمرَ، فقال عمرُ: يا أنس استحى قَاتِلَ البَرَاءِ بنِ مَالكٍ وَمَجْزَأةَ بْنِ ثَوْرٍ، فأسلم، وفرض له".  

يعقوب بن سفيان