9. It most certainly is so, as it is written: "And Hashem smote all the firstborn" (Ibid. 29). "And Hashem" INDICATES Him, ZEIR ANPIN, and His courthouse, MALCHUT. That courthouse is present here. THEREFORE, IT SAYS, "THE DESTROYER." It is always imperative to show a deed BELOW in order TO AWAKEN A CORRESPONDING ONE ABOVE to be saved. BECAUSE OF THAT, IT WAS NECESSARY TO PLACE THE BLOOD OVER THE DOOR LINTEL AND THE TWO SIDE POSTS, TO AROUSE MERCY FOR THEM ABOVE. Similar to that are THE OFFERINGS on the altar; this is in order that the Destroyer shall not come there.