It is narrated from Sayyiduna Samurah bin Jundub (may Allah be pleased with him) that a man once said to the Messenger of Allah (peace and blessings be upon him): "When the armies come, forbid the people of Madinah to water the date palms." He (peace and blessings be upon him) said: "If I were to forbid this to you, you would be burnt up; and not even the mountains could bear what the prophets forbid."
Hadith Referenceالمعجم الكبير للطبراني / باب السين / 7062