Sirach 38:28

28 So it is with smiths who sit near an anvil and who closely examine works of iron. The blast of the fire will melt their flesh, and they will struggle with the heat of the furnace. The sound of the hammer will strike their ears again and again, and their eyes are focused on the pattern of the object. They will devote themselves to finishing the work, and they lose sleep in order to complete its decoration.

Sirach 38:28 In-Context

26 Their hearts are given over to plowing furrows, and they lose sleep because they're concerned about supplying heifers with food.

27 So it is also with every craftsperson and master artisan who carries over the day's work into the night, who carves figures on seals and works diligently to make diverse ornamentations. They will devote themselves to producing a lifelike painting, and they lose sleep in order to finish their work.

28 So it is with smiths who sit near an anvil and who closely examine works of iron. The blast of the fire will melt their flesh, and they will struggle with the heat of the furnace. The sound of the hammer will strike their ears again and again, and their eyes are focused on the pattern of the object. They will devote themselves to finishing the work, and they lose sleep in order to complete its decoration.

29 So it is with potters sitting at their work, turning the wheel at their feet. They lie down always feeling anxiety about their work, and every product of theirs is valued.

30 They will mold the clay with their hands and work the wheel with their feet. They will devote themselves to finishing the glazing, and they lose sleep in order to clean the kiln.