The feet of the son of Adam shall not move from before his Lord on the Day of Judgement, until he is asked about five things:

1) About his life and what he did with it,
2) About his youth and what he wore it out in,
3) About his wealth and how he earned it
4) And spent it upon,
5) And what he did with what he knew (knowledge).

(SUNAN TIRMIDHI Vol #4, Hadith #2316-2317)