en_tn_condensed/isa/47/14.md

they will become like stubble. The fire will burn them up

Yahweh compares the magicians and sorcerers to straw that burns quickly in a fire. This means that Yahweh will destroy them as easily as fire burns stubble, and so they are powerless to save Babylon.

the hand of the flame

"the power of the flame"

There are no coals to warm them and no fire for them to sit by

Yahweh emphasizes that this is a destructive fire by stating that it is not one that people will use to warm themselves.