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.
muslim:1857aʿUbaydullāh b. Muʿādh from my father > Shuʿbah > ʿAmr / Ibn Murrah > ʿAbdullāh b. Abū Awfá

The Companions of the Tree (i e. those who swore fealty under the tree) were one thousand and three hundred, and the people of Aslam tribe were one-eighth of the Muhajirs.  

مسلم:١٨٥٧aحَدَّثَنَا عُبَيْدُ اللَّهِ بْنُ مُعَاذٍ حَدَّثَنَا أَبِي حَدَّثَنَا شُعْبَةُ عَنْ عَمْرٍو يَعْنِي ابْنَ مُرَّةَ حَدَّثَنِي عَبْدُ اللَّهِ بْنُ أَبِي أَوْفَى قَالَ

كَانَ أَصْحَابُ الشَّجَرَةِ أَلْفًا وَثَلاَثَمِائَةٍ وَكَانَتْ أَسْلَمُ ثُمُنَ الْمُهَاجِرِينَ  


See similar narrations below:

Collected by Ḥākim, Ibn Ḥibbān, Suyūṭī
hakim:6434Abū al-ʿAbbās Muḥammad b. Yaʿqūb > Ibrāhīm b. Marzūq > Wahbb. Jarīr > Shuʿbah > ʿAmr b. Murrah

[Machine] "Abdullah ibn Abi Aufa was one of the companions of the Prophet ﷺ and he was one of the 1,400 individuals from the Ansar who embraced Islam on that day which was known as "The Day of the Migrants.""  

الحاكم:٦٤٣٤حَدَّثَنَا أَبُو الْعَبَّاسِ مُحَمَّدُ بْنُ يَعْقُوبَ ثَنَا إِبْرَاهِيمُ بْنُ مَرْزُوقٍ ثَنَا وَهْبُ بْنُ جَرِيرٍ ثَنَا شُعْبَةُ عَنْ عَمْرِو بْنِ مُرَّةَ

عَنْ عَبْدِ اللَّهِ بْنِ أَبِي أَوْفَى «وَكَانَ مِنْ أَصْحَابِ الشَّجَرَةِ أَلْفًا وَأَرْبَعُمِائَةٍ وَكَانَتْ أَسْلَمُ ثُمُنَ الْمُهَاجِرِينَ يَوْمَئِذٍ»  

ذِكْرُ الْعَدَدِ الَّذِي كَانَ مَعَ الْمُصْطَفَى ﷺ يَوْمَ الشَّجَرَةِ مِنْ أَصْحَابِهِ

ibnhibban:4803ʿUmar b. Muḥammad al-Hamdānī > Bundār > Muḥammad b. Jaʿfar > Shuʿbah > ʿAmr b. Murrah > ʿAbdullāh b. Abū Awfá

[Machine] I heard Abdullah bin Abi Awfa saying, "There were one thousand and three hundred of us on the day of the Treaty of Hudaybiyyah, and at that time, the number of Muslims was eight hundred. May Allah have mercy on them."  

ابن حبّان:٤٨٠٣أَخْبَرَنَا عُمَرُ بْنُ مُحَمَّدٍ الْهَمْدَانِيُّ حَدَّثَنَا بُنْدَارٌ حَدَّثَنَا مُحَمَّدُ بْنُ جَعْفَرٍ حَدَّثَنَا شُعْبَةُ عَنْ عَمْرِو بْنِ مُرَّةَ قَالَ

سَمِعْتُ عَبْدَ اللَّهِ بْنَ أَبِي أَوْفَى يَقُولُ «كُنَّا يَوْمَ الشَّجَرَةِ أَلْفًا وَثَلَاثَ مِائَةٍ وَكَانَتْ أَسْلَمُ يَوْمَئِذٍ ثُمْنَ الْمُهَاجِرِينَ رَحِمَهُمُ اللَّهُ»  

suyuti:397-5bʿAbdullāh b. Abá Awfá
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السيوطي:٣٩٧-٥b

"عَنْ عَبْدِ اللهِ بْنِ أَبى أَوْفَى قَالَ: كنَّا يَوْمَ الشَّجَرَةِ أَلفًا وَأرْبَعَمايةٍ، أَوْ أَلفًا وَثَلاثمائة وَكَانَتْ أَسْلَمُ يَوْمَئِذٍ ثُمْنَ المُهَاجِرينَ".  

[ش] ابن أبى شيبة وأبو نعيم في المعرفة