The Prophet (ﷺ) said, "A time will come when one will not care how one gains one's money, legally or illegally."
Sahih al-Bukhari Book 34, Hadith 13
← Previous Hadith While we were offering the prayer with the Prophet (ﷺ) a caravan carrying food came from Sham. The people looked towards the caravan (and went to it) and only twelve persons remained with the Prophet. So, the Divine Inspiration came; "But when they see some bargain or some amusement, they disperse headlong to it." (62.11)

Sahih al-Bukhari Book 34, Hadith 12 Next Hadith → I used to practice money exchange, and I asked Zaid bin 'Arqam about it, and he narrated what the Prophet said in the following: Abu Al-Minhal said, "I asked Al-Bara' bin `Azib and Zaid bin Arqam about practicing money exchange. They replied, 'We were traders in the time of Allah's Messenger (ﷺ) and I asked Allah's Messenger (ﷺ) about money exchange. He replied, 'If it is from hand to hand, there is no harm in it; otherwise it is not permissible."

Sahih al-Bukhari Book 34, Hadith 14