Exodus 8:10

And he said, To-morrow— Nothing could tend more strongly to prove that Jehovah was the sole author of these miraculous punishments, than the permission given to Pharaoh to choose his own time for the removal. Indeed Pharaoh had no sooner fixed upon the time, than Moses leads him to this reflection: He said, be it according to thy word; that thou mayest know, that there is none like unto the Lord our God. Some have been very anxious to find out a reason why Pharaoh should choose the morrow, rather than the present day, for the removal of the frogs: whereas the Hebrew, agreeable to the marginal translation, expresses his desire of an instantaneous removal. It should be rendered, and he said, against to-morrow; למחר lemachar; i.e. let them be instantly removed.