It is narrated from Sayyiduna Zayd bin Arqam (may Allah be pleased with him); he said: In the time of the Messenger of Allah (peace and blessings be upon him) we used to recite: "If the son of Adam had two valleys of gold or silver, he would wish for a third, and nothing fills the belly of the son of Adam except dust, and Allah accepts the repentance of whoever repents."
Hadith Referenceالمعجم الكبير للطبراني / باب الزاي / 5013