Sunan Abu Dawud
2734
Sahih+3

Narrated AbuUmrah (al-Ansari?): We four persons, came to the Messenger of Allah (ﷺ), and we (i.e. each one of us) had horses. He therefore, allotted one portion for each of us, and two portions for his horse

SahihAl-Albani
SahihMuhammad Muhyi Al-Din Abdul Hamid