Caution: Translations of Quran and Ḥadīth may lead to possible misapplications and misinterpretations. This site is intended for students of sacred knowledge that are proficient in comprehending classical Arabic and have a strong foundation in Islamic sciences. Also note that religious injunctions rely on several aspects beyond what one may glean through reading individual aḥādīth.
suyuti:18a

"The last Surah revealed was Surat Al-Ma'idah and Al-Fath." (Using translation from Tirmidhī 3063)   

السيوطي:١٨a

"آخِرُ سُورةٍ نَزَلَت المائدةُ".  

[ت] الترمذي

See similar narrations below:

Collected by Tirmidhī, Ḥākim, Suyūṭī
tirmidhi:3063Qutaybah > ʿAbdullāh b. Wahb > Ḥuya > Abū ʿAbd al-Raḥman al-Ḥubulī > ʿAbdullāh b. ʿAmr

"The last Surah revealed was Surat Al-Ma'idah and Al-Fath."  

الترمذي:٣٠٦٣حَدَّثَنَا قُتَيْبَةُ حَدَّثَنَا عَبْدُ اللَّهِ بْنُ وَهْبٍ عَنْ حُيَىٍّ عَنْ أَبِي عَبْدِ الرَّحْمَنِ الْحُبُلِيِّ عَنْ عَبْدِ اللَّهِ بْنِ عَمْرٍو قَالَ

آخِرُ سُورَةٍ أُنْزِلَتْ سُورَةُ الْمَائِدَةِ  

قَالَ أَبُو عِيسَى هَذَا حَدِيثٌ حَسَنٌ غَرِيبٌ وَرُوِيَ عَنِ ابْنِ عَبَّاسٍ أَنَّهُ قَالَ آخِرُ سُورَةٍ أُنْزِلَتْ (إِذَا جَاءَ نَصْرُ اللَّهِ وَالْفَتْحُ )
hakim:3211Abū al-ʿAbbās > Baḥr b. Naṣr > Quriʾ > Ibn WahbAkhbarak Ḥuyay b. ʿAbdullāh al-Maʿāfirī > Abū ʿAbd al-Raḥman al-Ḥubulī Ḥaddath > ʿAbdullāh b. ʿAmr

"The last Surah revealed was Surat Al-Ma'idah and Al-Fath." (Using translation from Tirmidhī 3063)   

الحاكم:٣٢١١وَحَدَّثَنَا أَبُو الْعَبَّاسِ ثنا بَحْرُ بْنُ نَصْرٍ قَالَ قُرِئَ عَلَى ابْنِ وَهْبٍ أَخْبَرَكَ حُيَيُّ بْنُ عَبْدِ اللَّهِ الْمَعَافِرِيُّ قَالَ سَمِعْتُ أَبَا عَبْدِ الرَّحْمَنِ الْحُبُلِيُّ حَدَّثَ عَنْ عَبْدِ اللَّهِ بْنِ عَمْرٍو

أَنَّ «آخِرَ سُورَةٍ نَزَلَتِ سُورَةٍ الْمَائِدَةُ»  

هَذَا حَدِيثٌ صَحِيحٌ عَلَى شَرْطِ الشَّيْخَيْنِ وَلَمْ يُخْرِجَاهُ على شرط البخاري ومسلم