Sayyiduna Ibn Abbas (may Allah be pleased with them both) narrated: The Messenger of Allah (peace and blessings be upon him) used to say this often, so I do not know whether it was something he considered preferable or if it is from the Book of Allah: "If a person has two valleys full of wealth, he will wish for a third like them; nothing will fill his soul except (the grave's) dust. Whoever repents, Allah accepts his repentance."
Hadith Referenceمسند اسحاق بن راهويه / كتاب الزهد / 939
Hadith Takhrij«بخاري ، كتاب الرقاق ، باب يتقي من فتنه المال ، رقم : 6436 . مسلم ، كتاب الزكاة ، باب لو ان لابن آدم وادبين الخ ، رقم : 1048 . سنن ترمذي ، رقم : 2337 . سنن ابن ماجه ، رقم : 4235 . مسند احمد : 370/1 .»