'Brands' in the Bible

When he had set the brands on fire, he let them go into the standing grain of the Philistines, and burnt up both the shocks and the standing grain, and also the olive groves.

Behold, all you who kindle a fire, who adorn yourselves with torches around yourselves; walk in the flame of your fire, and among the brands that you have kindled. You shall have this of my hand; you shall lie down in sorrow.