Exodus 8:2

And if thou refuse to let them go ,.... Will not obey the orders:

I will smite all thy borders with frogs ; he gives him warning of the blow before he strikes, which shows his clemency and goodness, his patience and longsuffering; and this he did, not only that he might have time and space for repentance, and thereby avoid the blow; but that when it came, he might be sensible it was not by chance, or owing to second causes, but was from the Lord himself.

I will smite all thy borders with frogs : fill the whole land of Egypt with them, to the utmost borders thereof on every side. Some F17 R. Chananeel apud Abendana, and some in Aben Ezra in Ioc. say the word signifies a large Egyptian fish, which in the Arabic tongue is called Altamsach, that is, a crocodile, with which the Nile abounded; but such a creature could not invade and attack them in the manner as is after related.