The Prophet Muhammad صلى الله عليه وسلم said: “The feet of a servant will not move on the Day of Judgment until he has been questioned about four things: his life – how he spent it, his knowledge – how he acted upon it, his wealth – where he earned it and how he spent it, and his body – how he used it.”

Tirmidhi, Kitab sifat al Qiyamah wal Raqa’iq