'Coals' in the Bible

The iron-smith hath a chisel, and he worketh in the coals, and he fashioneth it with hammers, and worketh it with his strong arm; but he is hungry, and his strength faileth; he hath not drunk water, and he is faint.

And none taketh it to heart, neither is there knowledge nor understanding to say, I have burned part of it in the fire, and have also baked bread upon the coals thereof, I have roasted flesh, and eaten it, and with the rest thereof shall I make an abomination? shall I bow down to a block of wood?