Exodus 7:25

And seven days were fulfilled, after that the LORD had smitten the river.

Ver. 25. And seven days were fulfilled.] So long the plague continued; that they might be sensible of it; and not do as the dog, who getting out of the water, shakes his ears, and there is an end. Surely if these Egyptians had believed the prediction of this plague, they would have done as Pliny saith camels do - Implentur cameli, cum bibendi est occasio et in praeteritum et in futurum. They would have drunk for hereafter also. a

a Plin., lib. viii. cap. 18.