"The Messenger of Allah forbade the earnings of a cupper, the price of a dog and stud fees for a stallion." (Using translation from Nasāʾī 4673)
سَمِعْتُ أَبَا هُرَيْرَةَ يَقُولُ نَهَى رَسُولُ اللهِ ﷺ عَنْ كَسْبِ الْحَجَّامِ وَعَنْ ثَمَنِ الْكَلْبِ وَعَسْبِ الْفَحْلِ