Sahih Muslim 1618
Sahih Muslim · Book 23: The Book of the Rules of Inheritance · The Last Verse To Be Revealed Was The Verse Of Kalalah
Al-Bara' (Allah be pleased with him) reported that the last verse revealed was:
حَدَّثَنَا عَمْرٌو النَّاقِدُ ، حَدَّثَنَا أَبُو أَحْمَدَ الزُّبَيْرِيُّ ، حَدَّثَنَا مَالِكُ بْنُ مِغْوَلٍ ، عَنْ أَبِي، السَّفَرِ عَنِ الْبَرَاءِ ، قَالَ آخِرُ آيَةٍ أُنْزِلَتْ يَسْتَفْتُونَكَ .
" They ask of thee religious verdict.." (iv. 177).