(174) بَابُ ارْحَمْ مَنْ فِي الأَرْضِ
Jarir reported that the Prophet, may Allah bless him and granthim peace, said, "Allah will not show mercy to a person who does not showmercy to other people."
Reference: Al-Adab Al-Mufrad 375
In-book reference: Book 20, Hadith 4
English translation: Book 20, Hadith 375