Moon of Israel by H. Rider Haggard

Now of all the terrors of which this turning of the water into blood was the beginning in Egypt, I, Ana, the scribe, will not write, for if I did so, never in my life-days should I, who am old, find time to finish the story of them. Over a period of many, many moons they came, one by one, till the land grew mad with want and woe. Always the tale was the same. The Hebrew prophets would visit Pharaoh at Tanis and demand that he should let their people go, threatening him with vengeance if he refused. Yet he did refuse, for some madness had hold of him, or perhaps the god of the Israelites laid an enchantment on him, why I know not.

Thus but a little while after the terror of blood came a plague of frogs that filled Egypt from north to south, and when these were taken away made the air to stink. This miracle Ki and his company worked also, sending the frogs into Goshen, where they plagued the Israelites. But however it came about, at Seti's palace at Memphis and on the land that he owned around it there were no frogs, or at least but few of them, although at night from the fields about the sound of their croaking went up like the sound of beaten drums.