The last Verse that was revealed was: 'They ask you for a legal verdict: Say: Allah directs (thus) about Al-Kalalah (those who leave no descendants or ascendants as heirs).' And the last Sura which was revealed was Baraatun (9) .  

سَمِعْتُ الْبَرَاءَ ؓ يَقُولُ آخِرُ آيَةٍ نَزَلَتْ {يَسْتَفْتُونَكَ قُلِ اللَّهُ يُفْتِيكُمْ فِي الْكَلاَلَةِ} وَآخِرُ سُورَةٍ نَزَلَتْ بَرَاءَةٌ  

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  

The last Verse that was revealed was: 'They ask you for a legal verdict: Say: Allah directs (thus) about Al-Kalalah (those who leave no descendants or ascendants as heirs).' And the last Sura which was revealed was Baraatun (9) . (Using translation from Bukhārī 4654)   

سَمِعْتُ الْبَرَاءَ يَقُولُ «آخِرُ آيَةٍ نَزَلَتْ آيَةُ الْكَلَالَةِ وَآخِرُ سُورَةٍ نَزَلَتْ بَرَاءَةٌ»