"And be afraid of the Day when you shall be brought back to Allah.. ." (V.2:281)
Narrated Ibn `Abbas:The last Verse (in the Qur'an) revealed to the Prophet (ﷺ) was the Verse dealing with usury (i.e. Riba).
Reference
Sahih al-Bukhari 4544
In-book reference
Book 65, Hadith 67
USC-MSA web (English)
Vol. 6, Book 60, Hadith 67
Translation by Dr. M. Muhsin Khan · Language: EN
Sahih
Arabic Text
حَدَّثَنَا قَبِيصَةُ بْنُ عُقْبَةَ، حَدَّثَنَا سُفْيَانُ، عَنْ عَاصِمٍ، عَنِ الشَّعْبِيِّ، عَنِ ابْنِ عَبَّاسٍ ـ رضى الله عنهما ـ قَالَ آخِرُ آيَةٍ نَزَلَتْ عَلَى النَّبِيِّ صلى الله عليه وسلم آيَةُ الرِّبَا.