He sent {b} divers sorts of flies among them, which devoured them; and frogs, which destroyed them.

(b) This word signifies a confused mixture of flies and venomous worms. Some take it for all sorts of serpents: some for all wild beasts.

Wesley's Notes

78:45 Flies - These flies were doubtless extraordinary in their nature, and hurtful qualities. And the like is to be thought concerning the frogs.

Jamieson-Fausset-Brown Bible Commentary

45. The dog-fly or the mosquito.

Matthew Henry's Concise Commentary

78:40-55. Let not those that receive mercy from God, be thereby made bold to sin, for the mercies they receive will hasten its punishment; yet let not those who are under Divine rebukes for sin, be discouraged from repentance. The Holy One of Israel will do what is most for his own glory, and what is most for their good. Their forgetting former favours, led them to limit God for the future. God made his own people to go forth like sheep; and guided them in the wilderness, as a shepherd his flock, with all care and tenderness. Thus the true Joshua, even Jesus, brings his church out of the wilderness; but no earthly Canaan, no worldly advantages, should make us forget that the church is in the wilderness while in this world, and that there remaineth a far more glorious rest for the people of God.