It is narrated from Sayyiduna Awf bin Malik (may Allah be pleased with him) that the Messenger of Allah (peace and blessings be upon him) stood among his Companions and said: "Do you fear poverty or destitution, or does the world worry you? Indeed Allah is going to grant you the conquest of Persia and Rome, and the world will be poured upon you in torrents, until, if you go astray, nothing will lead you astray except it (the love of the world)."
Hadith Referenceالمعجم الكبير للطبراني / باب العين / 15184