(163) بَابُ فَضْلِ الْكَبِيرِ
'Abdullah ibn 'Amr ibn al-'As reported that it reached him thatthe Prophet, may Allah bless him and grant him peace, said, "Anyone whodoes not show mercy to our children nor acknowledge the right of our oldpeople is not one of us."
Reference: Al-Adab Al-Mufrad 354
In-book reference: Book 18, Hadith 2
English translation: Book 18, Hadith 354