Sahih al-Bukhari 6012
Sahih al-Bukhari · Book 78: Good Manners and Form (Al-Adab) · Being merciful to the people and to the animals
Narrated Anas bin Malik:
حَدَّثَنَا أَبُو الْوَلِيدِ ، حَدَّثَنَا أَبُو عَوَانَةَ ، عَنْ قَتَادَةَ ، عَنْ أَنَسِ بْنِ مَالِكٍ ، عَنِ النَّبِيِّ صلى الله عليه وسلم قَالَ " مَا مِنْ مُسْلِمٍ غَرَسَ غَرْسًا فَأَكَلَ مِنْهُ إِنْسَانٌ أَوْ دَابَّةٌ إِلاَّ كَانَ لَهُ صَدَقَةً " .
The Prophet (ﷺ) said, "If any Muslim plants any plant and a human being or an animal eats of it, he will be rewarded as if he had given that much in charity."