The Book Pertaining to Piety and Softening of Hearts (Kitab Al-Zuhd wa Al-Raqa'iq)
Muslim :: Book 42 : Hadith 7063
Abu Huraira reported Allah's Messenger (may peace be upon him) as saying: A servant says, My wealth. my wealth, but out of his wealth three things are only his: whatever he eats and makes use of or by means of which he dresses himself and it wears out or he gives as charity, and this is what he stored for himself (as a reward for the Hereafter), and what is beyond this (it is of no use to you) because you are to depart and leave it for other people. This hadith has been narrated on the authority of al-'Ala' b. 'Abd al-Rahman with the same chain of transmitters.