Sahih al-Bukhari · Book 64 · Hadith 4051
حَدَّثَنَا مُحَمَّدُ بْنُ يُوسُفَ، عَنِ ابْنِ عُيَيْنَةَ، عَنْ عَمْرٍو، عَنْ جَابِرٍ ـ رضى الله عنه ـ قَالَ نَزَلَتْ هَذِهِ الآيَةُ فِينَا {إِذْ هَمَّتْ طَائِفَتَانِ مِنْكُمْ أَنْ تَفْشَلاَ} بَنِي سَلِمَةَ وَبَنِي حَارِثَةَ، وَمَا أُحِبُّ أَنَّهَا لَمْ تَنْزِلْ، وَاللَّهُ يَقُولُ {وَاللَّهُ وَلِيُّهُمَا}
Narrated Jabir: This Verse: "When two of your parties almost Decided to fall away..." was revealed in our connection, i.e. Bani Salama and Bani Haritha and I would not have liked that, if it was not revealed, for Allah…
SahihQuran reference