Moses
Numbers 33:4ESV·traditional attribution

while the Egyptians were burying all their firstborn, whom the LORD had struck down among them. On their gods also the LORD executed judgments.

John Gill Reformed Baptist

For the Egyptians buried all their firstborn, which the Lord had smitten among them,.... Which contributed much to the more easy and safe deliverance of the children of Israel; for their hearts were heavy with sorrow, and their hands were full, and they had other work to do, namely, to bury their dead, than to molest Israel; and besides, they knew it was for detaining...

Jamieson-Fausset-Brown Reformed

upon their gods--used either according to Scripture phraseology to denote their rulers (the first-born of the king and his princes) or the idolatrous objects of Egyptian worship.

Geneva Bible Notes Reformed

For the Egyptians buried all [their] firstborn, which the LORD had smitten among them: upon their gods also the LORD executed judgments. (b) Either meaning their idols, or their men of authority.