"The Messenger of Allah said: 'The worst of earnings arte the gift of a female fornicator, the price of a dog and the earnings of a cupper."" (Using translation from Nasāʾī 4294)
أَنَّهُ سَمِعَ رَسُولَ اللهَِ يَقُولُ «شَرُّ الْكَسْبِ كَسْبُ الْحَجَّامِ وَثَمَنُ الْكَلْبِ وَمَهْرُ الْبَغِيِّ»