(176) بَابُ رَحْمَةِ الْبَهَائِمِ
Abu Umama that the Messenger of Allah, may Allah bless him andgrant him peace, said, "Anyone who shows mercy, even to an animal meantfor slaughtering, will be shown mercy by Allah on the Day of Rising."
Reference: Al-Adab Al-Mufrad 381
In-book reference: Book 20, Hadith 10
English translation: Book 20, Hadith 381