(5) باب مَا يُكْرَهُ مِنَ الاِحْتِيَالِ فِي الْبُيُوعِ
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
In-book reference: Book 90, Hadith 9
USC-MSA web (English) reference(deprecated numbering scheme): Vol. 9, Book 86, Hadith 92