(173) بَابُ قَوْلِ الرَّجُلِ لِلصَّغِيرِ: يَا بُنَيَّ
Jarir reported that the Prophet, may Allah bless him and granthim peace, said, "Allah Almighty will not show mercy to the person whodoes not show mercy to other people."
Reference: Al-Adab Al-Mufrad 370
In-book reference: Book 19, Hadith 9
English translation: Book 19, Hadith 370