(174) بَابُ ارْحَمْ مَنْ فِي الأَرْضِ
Mu'awiya ibn Qurra reported that his father said, "A man said,'Messenger of Allah, I was going to slaughter a sheep and then I felt sorryfor it (or 'sorry for the sheep I was going to slaughter').' He said twice,'Since you showed mercy to the sheep, Allah will show mercy to you.'" (ID)
Reference (ID): Al-Adab Al-Mufrad 373 (ID)
In-book reference (ID): Book 20, Hadith 2 (ID)
English translation (ID): Book 20, Hadith 373 (ID)