7. Come and behold: on the night that the Holy One, blessed be He, wanted to slaughter all these firstborn, as we have learned, the singers came to sing for Him when night fell. THE HOLY ONE, BLESSED BE HE, told them that the time was not opportune TO SING ANY SONG, since the inhabitants of the earth were singing another song. At midnight, the north wind was stirring and the Holy One, blessed be He, was wreaking vengeance FOR YISRAEL. Yisrael were singing their song with loud voices and, at that moment, He made them free from everyone. The supernal angels and all the HIGHEST camps together were listening to the voices of Yisrael after they were circumcised, and marked their houses with that blood and the blood of the Paschal lamb with three marks, "upon the lintel, and on the two side posts" (Shemot 12:23).