“And the blood shall be to you for a token upon the houses where ye 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 smite the land of Egypt.” ( Exodus 12:13 )
9 And Moses said unto Pharaoh, Glory over me: when shall I entreat for thee, and for thy servants, and for thy people, to destroy the frogs from thee and thy houses, that they may remain in the river only? 10 And he said, To morrow. And he said, Be it according to thy word: that thou mayest know that there is none like unto the Lord our God. (Exodus 8:9-10)