Hadith

Rasul Allah (sal Allahu alaihi wa sallam) said: "A servant of God will remain standing on the Day of Judgment until he is questioned about his (time on earth) and how he used it; about his knowledge and how he utilized it; about his wealth and from where he acquired it and in what (activities) he spent it; and about his body and how he used it." [Tirmidhi]