Ecclesiastes 11:10 in the King James Version
Therefore remove sorrow from thy heart, and put away evil from thy flesh: for childhood and youth are vanity.
Context
9 Rejoice, young man, in your youth, and let your heart cheer you in the days of your youth, and walk in the ways of your heart, and in the sight of your eyes; but know that for all these things God will bring you into judgment.
10 Therefore remove sorrow from your heart, and put away evil from your flesh; for youth and the dawn of life are vanity.