It is narrated from Sayyiduna Sahl bin Sa'd (may Allah be pleased with him) that the Prophet (peace and blessings be upon him) passed by a dead goat and said: "Do you see how worthless this is to its owners?" The Companions said: O Messenger of Allah, it is only a dead goat. He (peace and blessings be upon him) said: "By Allah, the world is even more worthless to Allah than this is to its owners."
Hadith Referenceالمعجم الكبير للطبراني / باب السين / 5817