And Moses said, behold, I go out from thee,.... Directly, immediately, to the place where he was wont to meet the Lord, and receive orders and instructions from him:
and I will entreat the Lord that the swarms of flies may depart from Pharaoh; for as he sent them, he only could remove them, and he could do the one as easily as he did the other:
from his servants, and from his people, tomorrow; that there might be a thorough and clear riddance of them from him and all his subjects, and out of every part of his kingdom; which should be done, and was done on the morrow, that is, on the thirtieth day of Adar, answering to part of our February, and part of our March, so that this must be about the middle of March:
but let not Pharaoh deal deceitfully any more, in not letting the people go to sacrifice to the Lord; as in the plague of frogs, refusing to let them go when it was past; which Moses calls an illusion, a mocking of them, and dealing deceitfully, to which he here refers; see Exodus 8:15.