And at midnight the LORD smote all the firstborn in the land of Egypt: from the firstborn of Pharaoh that sat on his seat, unto the firstborn of the captive that was in prison, and all firstborn of the cattle.

I will smite them with the pestilence and destroy them, and will make of thee a greater nation and a mightier than they."

And Moses said unto Aaron, "Take a censer and put fire therein out of the altar, and pour on cense, and go quickly unto the congregation and make an atonement for them. For there is wrath gone out from the LORD, and there is a plague begun."

When he made a way to his fearful indignation, and spared not their souls from death, but gave their life over to the pestilence;

The LORD is a jealous God, and a taker of vengeance: yea, a taker of vengeance is the LORD, and wrathful. The LORD taketh vengeance of his enemies, and reserveth displeasure for his adversaries.

And

The earth trembled and quaked; the very foundations also of the hills shook and were removed, because he was wroth. {TYNDALE: And the earth trembled and quoke, and the foundations of heaven moved and shook, because he was angry.}

Burning coals

Burnt with hunger and consumed with heat and with bitter pestilence. I will also send the teeth of beasts upon them, and poison serpents.

General references

He holdeth back his stool, that it can not be seen, and spreadeth his clouds before it.

His breath maketh the coals burn, the flame goeth out of his mouth.

There goeth a fire before him, to burn up his enemies on every side.