(2) باب اجْتِنَابِ الشُّبُهَاتِ فِي الْكَسْبِ
It was narrated that Abu Hurairah said:
"The Messenger of Allah said: "There will come a time when there will be no one left who does not consume Riba, and whoever does not consume it will nevertheless be affected by residue." (Sahih )
Reference: Sunan an-Nasa'i 4455
In-book reference: Book 44, Hadith 7
English translation: Vol. 5, Book 44, Hadith 4460