Sahih al-Bukhari 6962

Arabic

حَدَّثَنَا إِسْمَاعِيلُ، حَدَّثَنَا مَالِكٌ، عَنْ أَبِي الزِّنَادِ، عَنِ الأَعْرَجِ، عَنْ أَبِي هُرَيْرَةَ، أَنَّ رَسُولَ اللَّهِ صلى الله عليه وسلم قَالَ ‏ "‏ لاَ يُمْنَعُ فَضْلُ الْمَاءِ لِيُمْنَعَ بِهِ فَضْلُ الْكَلإِ ‏"‏‏.‏

English translation

Narrated Abu Huraira:Allah's Messenger (ﷺ) said, "One should not prevent others from watering their animals with the surplus of his water in order to prevent them from benefiting by the surplus of grass

Reference: Sahih al-Bukhari 6962, Book of Tricks. English translation by Dr. Muhammad Muhsin Khan.