(8) بَاب تَحْرِيمِ بَيْعِ فَضْلِ الْمَاءِ الَّذِي يَكُونُ بِالْفَلَاةِ وَيُحْتَاجُ إِلَيْهِ لِرَعْيِ الْكَلَأِ وَتَحْرِيمِ مَنْعِ بَذْلِهِ وَتَحْرِيمِ بَيْعِ ضِرَابِ الْفَحْلِ
Abu Huraira (Allah be pleased with him) reported Allah's Messenger (ﷺ) as saying:
Excess water must not be withheld so that the growth of herbage may be hindered.
Reference: Sahih Muslim 1566 a
In-book reference: Book 22, Hadith 45
USC-MSA web (English) reference(deprecated numbering scheme): Book 10, Hadith 3800