(3) باب آخِرِ آيَةٍ أُنْزِلَتْ آيَةُ الْكَلاَلَةِ
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.
Reference: Sahih Muslim 1618 b
In-book reference: Book 23, Hadith 14
USC-MSA web (English) reference(deprecated numbering scheme): Book 11, Hadith 3940