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muslim:1900 – Abū Bakr b. Abū Shaybah > Abū Usāmah > Zakariyyāʾ > Abū Isḥāq > al-Barāʾ

A man from Banu Nabit (one of the Ansar tribes) came to the Prophet ﷺ and said: I testify that there is no god except Allah and that thou art His bondman and Messenger. Then he went forward and fought until he was killed. The Prophet ﷺ said: He has done a little but shall be given a great reward.  

مسلم:١٩٠٠ – حَدَّثَنَا أَبُو بَكْرِ بْنُ أَبِي شَيْبَةَ حَدَّثَنَا أَبُو أُسَامَةَ عَنْ زَكَرِيَّاءَ عَنْ أَبِي إِسْحَاقَ عَنِ الْبَرَاءِ قَالَ

جَاءَ رَجُلٌ مِنْ بَنِي النَّبِيتِ إِلَى النَّبِيِّ ﷺ ح وَحَدَّثَنَا أَحْمَدُ بْنُ جَنَابٍ الْمِصِّيصِيُّ حَدَّثَنَا عِيسَى يَعْنِي ابْنَ يُونُسَ عَنْ زَكَرِيَّاءَ عَنْ أَبِي إِسْحَاقَ عَنِ الْبَرَاءِ قَالَ جَاءَ رَجُلٌ مِنْ بَنِي النَّبِيتِ قَبِيلٍ مِنَ الأَنْصَارِ فَقَالَ أَشْهَدُ أَنْ لاَ إِلَهَ إِلاَّ اللَّهُ وَأَنَّكَ عَبْدُهُ وَرَسُولُهُ ثُمَّ تَقَدَّمَ فَقَاتَلَ حَتَّى قُتِلَ فَقَالَ النَّبِيُّ ﷺ عَمِلَ هَذَا يَسِيرًا وَأُجِرَ كَثِيرًا  

See similar narrations below:

Collected by Bayhaqī
bayhaqi:18541 – Abū Bakr Aḥmad b. Muḥammad b. Ghālib al-Ḥāfiẓ> Abū al-ʿAbbās Muḥammad b. Aḥmad b. Ḥamdān al-Nīsābūrī > Muḥammad b. Ayyūb > Ibrāhīm b. Mūsá > ʿĪsá b. Yūnus > Zakariyyā > Abū Isḥāq > al-Barāʾ

[Machine] "A man came to the Prophet ﷺ and said, 'I bear witness that there is no god but Allah and that you are His servant and Messenger.' Then he advanced and fought until he was killed. The Prophet ﷺ said, 'He did very little work and will be rewarded abundantly.'"  

البيهقي:١٨٥٤١ – أَخْبَرَنَا أَبُو بَكْرٍ أَحْمَدُ بْنُ مُحَمَّدِ بْنِ غَالِبٍ الْحَافِظُ بِبَغْدَادَ ثنا أَبُو الْعَبَّاسِ مُحَمَّدُ بْنُ أَحْمَدَ بْنِ حَمْدَانَ النِّيسَابُورِيُّ ثنا مُحَمَّدُ بْنُ أَيُّوبَ أنبأ إِبْرَاهِيمُ بْنُ مُوسَى أنبأ عِيسَى بْنُ يُونُسَ ثنا زَكَرِيَّا عَنْ أَبِي إِسْحَاقَ عَنِ الْبَرَاءِ ؓ قَالَ

جَاءَ رَجُلٌ إِلَى النَّبِيِّ ﷺ فَقَالَ أَشْهَدُ أَنْ لَا إِلَهَ إِلَّا اللهُ وَأَنَّكَ عَبْدُهُ وَرَسُولُهُ ثُمَّ تَقَدَّمَ فَقَاتَلَ حَتَّى قُتِلَ فَقَالَ النَّبِيُّ ﷺ عَمِلَ هَذَا يَسِيرًا وَأُجِرَ كَثِيرًا  

رَوَاهُ مُسْلِمٌ فِي الصَّحِيحِ عَنْ أَحْمَدَ بْنِ جَنَابٍ عَنْ عِيسَى بْنِ يُونُسَ