Exodus 9:8; Exodus 9:10; Exodus 19:18

Exodus 9:8

8 Then the LORD said to Moses and Aaron, "Take for yourselves handfuls of soot from a kiln, and let Moses throw it toward the sky in the sight of Pharaoh.

Exodus 9:10

10 So they took soot from a kiln, and stood before Pharaoh; and Moses threw it toward the sky, and it became boils breaking out with sores on man and beast.

Exodus 19:18

18 Now Mount Sinai was all in smoke because the LORD descended upon it in fire; and its smoke ascended like the smoke of a furnace, and the whole mountain quaked violently.