It is narrated from Sayyiduna Jabir bin Abdullah (may Allah be pleased with them both) that the Messenger of Allah (peace and blessings be upon him) said: "Whoever revives barren land has a reward in it, and whatever those seeking sustenance eat from it is charity for him."
Hadith Referenceالسنن الكبرى للبيهقي / كتاب إحياء الموات / 11814