The last thing to be revealed was the verse on riba, but the Messenger of Allah ﷺ passed away and did not discuss it with us. So give up riba and doubtful things.
قَالَقَالَ عُمَرُ إِنَّ آخِرَ مَا نَزَلَ مِنَ الْقُرْآنِ آيَةُ الرِّبَا وَإِنَّ رَسُولَ اللهِ ﷺ قُبِضَ وَلَمْ يُفَسِّرْهَا فَدَعُوا الرِّبَا وَالرِّيبَةَ