'Soot' in the Bible

And Jehovah saith unto Moses and unto Aaron, 'Take to you the fulness of your hands of soot of a furnace, and Moses hath sprinkled it towards the heavens, before the eyes of Pharaoh,

And they take the soot of the furnace, and stand before Pharaoh, and Moses sprinkleth it towards the heavens, and it is a boil with blains, breaking forth, on man and on beast;