BUKHARI 6013: from Jarīr b. ʿAbdullāh —
The Prophet ﷺ said, "He who is not merciful to others, will not be treated mercifully.

البخاري ٦٠١٣: عن جرير بن عبد الله —
عَنِ النَّبِيِّ ﷺ قَالَ مَنْ لاَ يَرْحَمُ لاَ يُرْحَمُ


Agreed Upon (Luʿluʿ wa-al-Marjān)
Bukhārī > Adab (Good Manners and Form) > § Being merciful to the people and to the animals
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