(23) بَابُ قَوْلِ اللَّهِ تَعَالَى: {يَا أَيُّهَا الَّذِينَ آمَنُوا لاَ تَأْكُلُوا الرِّبَا أَضْعَافًا مُضَاعَفَةً وَاتَّقُوا اللَّهَ لَعَلَّكُمْ تُفْلِحُونَ}
Narrated Abu Hurairah (ra):
The Prophet (ﷺ) said "Certainly a time will come when people will not bother to know from where they earned the money, by lawful means or unlawful means." (See Hadith no. 2050)
Reference: Sahih al-Bukhari 2083
In-book reference: Book 34, Hadith 36
USC-MSA web (English) reference(deprecated numbering scheme): Vol. 3, Book 34, Hadith 296