The Book of Financial Transactions
44/2. Chapter:
Avoiding doubtful sources of earning
Sunan an-Nasai
حَدَّثَنَا الْقَاسِمُ بْنُ زَكَرِيَّا بْنِ دِينَارٍ، قَالَ حَدَّثَنَا أَبُو دَاوُدَ الْحَفَرِيُّ، عَنْ سُفْيَانَ، عَنْ مُحَمَّدِ بْنِ عَبْدِ الرَّحْمَنِ، عَنِ الْمَقْبُرِيِّ، عَنْ أَبِي هُرَيْرَةَ، قَالَ قَالَ رَسُولُ اللَّهِ صلى الله عليه وسلم " يَأْتِي عَلَى النَّاسِ زَمَانٌ مَا يُبَالِي الرَّجُلُ مِنْ أَيْنَ أَصَابَ الْمَالَ مِنْ حَلاَلٍ أَوْ حَرَامٍ " .
It was narrated that Abu Hurairah said: "The Messenger of Allah said: 'There will come a time when a man will not care where his wealth comes from, whether (the source is) Halal or Haram."
Reference : Sunan an-Nasa'i 4454In-book reference : Book 44, Hadith 6English translation : Vol. 5, Book 44, Hadith 4459