Uyaynah bin Hisn and al-Aqra' bin Habis (may Allah be pleased with them both) both came to Abu Bakr (may Allah be pleased with him) and said: "O successor of the Messenger of Allah! We have barren land in which there is no pasture and nothing of benefit; if you see fit for us to cultivate and farm it, then grant us that land." Then, mentioning the long hadith, the narrator says that Umar (may Allah be pleased with him) said: "Muhammad (peace and blessings be upon him) used to give to you to win your hearts, and Islam in those days was weak; now Allah Almighty has given Islam honour, so go and exert yourselves to the utmost; may Allah not spare you if you spare (yourselves)."
Hadith Referenceالسنن الكبرى للبيهقي / كتاب قسم الصدقات / 13189