Sahih al-Bukhari 6013
Book 78: Good Manners and Form (Al-Adab) · Narrated by Jarir bin `Abdullah
Arabic
حَدَّثَنَا عُمَرُ بْنُ حَفْصٍ، حَدَّثَنَا أَبِي، حَدَّثَنَا الأَعْمَشُ، قَالَ حَدَّثَنِي زَيْدُ بْنُ وَهْبٍ، قَالَ سَمِعْتُ جَرِيرَ بْنَ عَبْدِ اللَّهِ، عَنِ النَّبِيِّ صلى الله عليه وسلم قَالَ " مَنْ لاَ يَرْحَمُ لاَ يُرْحَمُ ".
English translation
Narrated Jarir bin `Abdullah:The Prophet (ﷺ) said, "He who is not merciful to others, will not be treated mercifully
Reference: Sahih al-Bukhari 6013, Book of Good Manners and Form (Al-Adab). English translation by Dr. Muhammad Muhsin Khan.