مِشْكَاةُ الْمَصَابِيحِ
Mishkat al-Masabih 2761
Business Transactions
Earning, and Seeking what is Lawful - Section 1
وَعَنْهُ قَالَ: قَالَ رَسُولُ اللَّهِ صَلَّى اللَّهُ عَلَيْهِ وَسَلَّمَ: «يَأْتِي عَلَى النَّاسِ زَمَانٌ لَا يُبَالِي الْمَرْءُ مَا أَخَذَ مِنْهُ أَمِنَ الْحَلَالِ أم من الْحَرَام» . رَوَاهُ البُخَارِيّ
He reported God's Messenger as saying, “A time will come to mankind when a man will not care whether what he gets comes from a lawful or an unlawful source.” Bukhari transmitted it.
Mishkat al-Masabih, 2761صَحِيحٌ (الألباني)