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

Malik related to me from Abu'z-Zinad from al-Araj from AbuHurayra that the Messenger of Allah, may Allah bless him and grant himpeace, said, "Excess water is not withheld in order to prevent herbagefrom growing." Translation Not Available

Book Ref: Muwatta Imam Malik Book 36 Hadith 1433
Web Ref:  Muwatta Imam Malik Book 36 Hadith 29