The Messenger of Allah ﷺ forbade (taking hire for) a stallion's covering. (Using translation from Abū Dāʾūd 3429)  

«نَهَى رَسُولُ اللَّهِ ﷺ عَنْ ثَمَنِ عَسْبِ الْفَحْلِ»  

[Machine] "Abu Hurairah, the Messenger of Allah ﷺ forbade the mating of a male donkey and the fee for a (female) prostitute."  

أَبُو هُرَيْرَةَ «نَهَى رَسُولُ اللَّهِ ﷺ عَنْ عَسْبِ الْفَحْلِ وَأَجْرِ الْمُومِسَةِ»