" They ask thee for a religious verdict; say: Allah gives you a religious verdict about Kalala (the person who has neither parents nor children)" (iv 177).  

آخِرُ آيَةٍ أُنْزِلَتْ مِنَ الْقُرْآنِ { يَسْتَفْتُونَكَ قُلِ اللَّهُ يُفْتِيكُمْ فِي الْكَلاَلَةِ}  

The last verse revealed (in the Holy Quran) is that pertaining to Kalala, and the last sura revealed is Sura al-Bara'at.  

سَمِعْتُ الْبَرَاءَ بْنَ عَازِبٍ يَقُولُ آخِرُ آيَةٍ أُنْزِلَتْ آيَةُ الْكَلاَلَةِ وَآخِرُ سُورَةٍ أُنْزِلَتْ بَرَاءَةُ  

The last complete sura revealed (in the Holy Qur'an) is Sura Tauba (i e. al-Bara'at, ix.), and the last verse revealed is that pertaining to Kalala.  

أَنَّ آخِرَ سُورَةٍ أُنْزِلَتْ تَامَّةً سُورَةُ التَّوْبَةِ وَأَنَّ آخِرَ آيَةٍ أُنْزِلَتْ آيَةُ الْكَلاَلَةِ  

Aba Ishaq reported this hadith on the authority of al-Bara' (Allah be pleased with him) with a slight variation of words, viz. the last sura that was revealed complete.  

أَنَّهُ قَالَ آخِرُ سُورَةٍ أُنْزِلَتْ كَامِلَةً  

" They ask of thee religious verdict.." (iv. 177).  

آخِرُ آيَةٍ أُنْزِلَتْ يَسْتَفْتُونَكَ