Abdullaahu ‘alayhi wa sallam, said
‘Who among you considers the wealth of their heirs to be more beloved to them than their own wealth?’ They said: ‘O Messenger of Allah, none of us considers the wealth of their heirs more beloved than their own wealth.’ The Prophet of Allah, sallallaahu ‘alayhi wa sallam, said: ‘The wealth of any one of you is what is spent in good causes, and the wealth of your heir is what is left and not spent before death.’”
Abdullaah ibn Ash-Shikhkheer (a Companion) said
` “I went to the Prophet of Allah, sallallaahu ‘alayhi wa sallam, while he was reading the verse (which means): «Competition in [worldly] increase diverts you.» [Quran: 102:1] and he, sallallaahu ‘alayhi wa sallam, said: ‘The son of Adam says, ‘My wealth, my wealth,’ but O son of Adam, is any of your wealth yours, except that which you consumed, wore, or gave as charity and it was kept as reward?’”
A similar narration is that of Abu Hurayrah which has the addition
“Whatever is besides that [aforementioned ways of spending], then that is going to leave a person, and will be left for other people.”