Sunan Abu Dawud
3524
Hasan+3

Narrated Amir ash-Sha'bi: The Prophet (ﷺ) said: If anyone finds an animal whose owners were helpless to provide fodder to it and so they turned it out (of their house), and he took it and looked after it, it will belong to him. Abu Dawud said: This is the tradition of Hammad. It is more plain and perfect

HasanAl-Albani
HasanMuhammad Muhyi Al-Din Abdul Hamid