Sirach 38:28

WEB(i) 28 So is the smith sitting by the anvil, And considering the unwrought iron: The vapor of the fire will waste his flesh; And in the heat of the furnace he will wrestle [with his work: ] The noise of the hammer will be ever in his ear, And his eyes are upon the pattern of the vessel; He will set his heart upon perfecting his works, And he will be wakeful to adorn them perfectly.