'Soot' in the Bible

Then the Lord said to Moses and Aaron, “Take handfuls of furnace soot, and Moses is to throw it toward heaven in the sight of Pharaoh.

So they took furnace soot and stood before Pharaoh. Moses threw it toward heaven, and it became festering boils on man and beast.

ח KhetNow they appear darker than soot;they are not recognized in the streets.Their skin has shriveled on their bones;it has become dry like wood.