Abu Huraira reported God’s Messenger as saying, “Excess water must not be sold for the purpose of having the herbage which grows from it sold." (Bukhari and Muslim.)

وَعَنْ أَبِي هُرَيْرَةَ قَالَ: قَالَ رَسُولُ اللَّهِ صَلَّى اللَّهُ عَلَيْهِ وَسَلَّمَ: «لَا يُبَاع فضل المَاء ليباع بِهِ الْكلأ»