Sunan an-Nasa'i 4671
سنن النسائي#4671SahihIt was narrated that Ibn 'Umar said:"The Messenger of Allah forbade charging stud fees for a stallion
Scholarly Authentication
We show the most cautious grade (weakest-wins) as the overall label. Individual scholars graded it as follows:
Abu GhuddahSahih
Al-AlbaniSahih
Zubair Ali ZaiSahih Bukhari
In-book reference: 44:223