'Dust' in the Bible

And Jehovah said unto Moses, Say unto Aaron, Stretch out thy rod, and smite the dust of the earth, that is may become lice throughout all the land of Egypt.

And they did so; and Aaron stretched out his hand with his rod, and smote the dust of the earth, and there were lice upon man, and upon beast; all the dust of the earth became lice throughout all the land of Egypt.

And it shall become small dust over all the land of Egypt, and shall be a boil breaking forth with blains upon man and upon beast, throughout all the land of Egypt.