And the blood shall be to you for a token upon the houses where you are: and when I see the blood, I will pass over you, and the plague shall not be upon you to destroy you, when I strike the land of Egypt.
And I will separate in that day the land of Goshen, in which my people dwell, that no swarms of flies shall be there; so that you may know that I am the LORD in the midst of the earth.
And also I have withheld the rain from you, when there were yet three months to the harvest: and I caused it to rain upon one city, and caused it not to rain upon another city: one place was rained upon, and the place upon which it did not rain withered.