Sayyiduna al-Sa'b bin Jaththamah (may Allah be pleased with him) says: I heard the Messenger of Allah (peace and blessings be upon him) say: "There is no protected pasture except for Allah and His Messenger (peace and blessings be upon him)."
Al-Zuhri (may Allah have mercy on him) said: Umar bin al-Khattab (may Allah be pleased with him) also had a protected pasture; it has reached me that he used to protect it for the charity camels.
Hadith Referenceالسنن الكبرى للبيهقي / كتاب إحياء الموات / 11806