Numbers 33:4

And the Egyptians buried those that died of them, even all that the Lord smote, every first-born in the land of Egypt; also the Lord executed vengeance on their gods.

For the Egyptians buried all their firstborn, which the Lord had smitten among them: upon their gods also the Lord executed judgments.

while the Egyptians were burying all their firstborn, whom Yahweh had struck among them. Yahweh also executed judgments on their gods.