[Machine] That the Prophet ﷺ named him "Muta'ah" and said to him, "O Muta'ah, you are obeyed among your people." And he said to him, "Go to your companions." And he carried him on a white horse and gave him the flag and said, "Whoever enters under my flag is protected from punishment."  

أَنَّ النَّبِيَّ ﷺ سَمَّاهُ مُطَاعًا وَقَالَ لَهُ «يَا مُطَاعُ أَنْتَ مُطَاعٌ فِي قَوْمِكَ» وَقَالَ لَهُ «امْضِ إِلَى أَصْحَابِكَ» وَحَمَلَهُ عَلَى فَرَسٍ أَبْلَقَ وَأَعْطَاهُ الرَّايَةَ وَقَالَ «مَنْ دَخَلَ تَحْتَ رايَتِي هَذِهِ فَقَدْ أَمِنَ مِنَ الْعَذَابِ»  

[Machine] From Muhammad ibn Ishaq regarding the name of the one who witnessed the Battle of Badr from the Ansar, then from the Banu Khazraj, then from the Banu Najjar, it is Abu Muhammad al-Ansari and his name is Mas'ud ibn Aws ibn Asram ibn Zaid ibn Tha'alabah ibn Ghanm ibn Malik ibn al-Najjar.  

عَنْ مُحَمَّدِ بْنِ إِسْحَاقَ فِي تَسْمِيَةِ مَنْ شَهِدَ بَدْرًا مِنَ الْأَنْصَارِ ثُمَّ مِنْ بَنِي الْخَزْرَجِ ثُمَّ مِنْ بَنِي النَّجَّارِ أَبُو مُحَمَّدٍ الْأَنْصَارِيُّ وَاسْمُهُ مَسْعُودُ بْنُ أَوْسِ بْنِ أَصْرَمَ بْنِ زَيْدِ بْنِ ثَعْلَبَةَ بْنِ غَنْمِ بْنِ مَالِكِ بْنِ النَّجَّارِ