出エジプト記 12:13

והיה הדם לכם לאת AND THE BLOOD SHALL BE UNTO YOU FOR A SIGN — it shall be to you for a sign, and not to others for a sign (Mekhilta). From this we may learn that they put the blood only inside their houses. וראיתי את הדם AND WHEN I SEE THE BLOOD — But surely everything is manifest to Him and He therefore did not need to look whether the blood had been put on the door-posts? But the meaning is: God says, I will set My eye (my attention) to take notice of the fact that you are engaged in the performance of My commands — then will I pass over you (Mekhilta). ופסחתי — This signifies I WILL SPARE you; similar to this is, (Isaiah 31:5) “Sparing (פסוח) and delivering”. (This is the explanation of Menachem ben Seruk). But I say that wherever the root פסח occurs it is an expression for leaping and springing over, so that ופסחתי here denotes that He sprang from the houses of the Israelites when He reached them, without having entered them, to the houses of the Egyptians — for they (the Egyptians and the Israelites) dwelt one next to the other. Of a like import is, (1 Kings 18:21) “How long will ye leap (פוסחים) upon two twigs?” So, too, all פסחים lame people walk as though they were springing, and are therefore termed פסחים. This, too, is the meaning of, (Isaiah 31:5) פסוח והמליט “He springs over him and delivers him” from amongst those who are being killed. ולא יהיה בכם נגף AND THE INFLICTION SHALL NOT BE UPON YOU — but it will be upon the Egyptians. — In the case that an Egyptian was in an Israelite’s house one might think that he would escape! Therefore Scripture says: “and the infliction shall not be upon you”, but it shall be upon the Egyptians who happen to be in your houses! In the case that an Israelite was in an Egyptians house, I might understand from this that he would be smitten just the same as he (the Egyptian)! Therefore Scripture says, “and the affliction shall not be upon you”, wherever you may happen to be (Mekhilta).

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 smite the land of Miżrayim.

וְהָיָה֩ הַדָּ֨ם לָכֶ֜ם לְאֹ֗ת עַ֤ל הַבָּתִּים֙ אֲשֶׁ֣ר אַתֶּ֣ם שָׁ֔ם וְרָאִ֙יתִי֙ אֶת־הַדָּ֔ם וּפָסַחְתִּ֖י עֲלֵכֶ֑ם וְלֹֽא־יִֽהְיֶ֨ה בָכֶ֥ם נֶ֙גֶף֙ לְמַשְׁחִ֔ית בְּהַכֹּתִ֖י בְּאֶ֥רֶץ מִצְרָֽיִם׃