Sahih Muslim , Book 23, Hadith 14 (In-Book) ⓘ
Abu Ishaq said that he heard al-Bara' b. 'Azib (Allah be pleased with him say: The last verse revealed (in the Holy Quran) is that pertaining to Kalala, and the last sura revealed is Sura al-Bara'at.
حَدَّثَنَا مُحَمَّدُ بْنُ الْمُثَنَّى، وَابْنُ، بَشَّارٍ قَالاَ حَدَّثَنَا مُحَمَّدُ بْنُ جَعْفَرٍ، حَدَّثَنَا شُعْبَةُ، عَنْ أَبِي إِسْحَاقَ، قَالَ سَمِعْتُ الْبَرَاءَ بْنَ عَازِبٍ، يَقُولُ آخِرُ آيَةٍ أُنْزِلَتْ آيَةُ الْكَلاَلَةِ وَآخِرُ سُورَةٍ أُنْزِلَتْ بَرَاءَةُ .
also referenced under: Hadith 1618 (Reference) & Book 11, Hadith 3940 (USC-MSA)