The Book of Musaqah
22/9. Chapter:
The prohibition of the price of a dog, the fee of a fortuneteller and the payment of a prostitute, and the prohibition of selling cats
Sahih Muslim
وَحَدَّثَنِي مُحَمَّدُ بْنُ حَاتِمٍ، حَدَّثَنَا يَحْيَى بْنُ سَعِيدٍ الْقَطَّانُ، عَنْ مُحَمَّدِ بْنِ يُوسُفَ، قَالَ سَمِعْتُ السَّائِبَ بْنَ يَزِيدَ، يُحَدِّثُ عَنْ رَافِعِ بْنِ خَدِيجٍ، قَالَ سَمِعْتُ النَّبِيَّ صلى الله عليه وسلم يَقُولُ " شَرُّ الْكَسْبِ مَهْرُ الْبَغِيِّ وَثَمَنُ الْكَلْبِ وَكَسْبُ الْحَجَّامِ " .
Rafi b. Khadij (Allah be pleased with him) reported: I heard Allah's Apostle (ﷺ) as saying: The worst earning is the earning of a prostitute, the price of a dog and the earning of a cupper.
Reference : Sahih Muslim 1568aIn-book reference : Book 22, Hadith 50USC-MSA web (English) reference : Book 10, Hadith 3805