Comentario sobre Exodo 12:7

ולקחו מן הדם AND THEY SHALL TAKE OF THE BLOOD — This refers to the ritual reception of the blood. One might think that they must take it in the hand; therefore Scripture states, (v. 22) “[and ye shall dip it in the blood] which is in the basin (Mekhilta d'Rabbi Yishmael 12:7:1).

המשקוף, the upper lintel which is visible to all when one enters though the door. The word appears in a context of viewing something in Genesis 26,8 וישקף אבימלך, when the King of the Philistines, acting like a peeping Tom, found out that Yitzchok and Rivkah were man and wife. Commentators who consider the word משקוף as relating to sounds made when the door hits the frame owe us other proof of such uses of the word in classical Hebrew texts. [a swipe at his grandfather Rashi. Ed.]

ולקחו מן הדם, “they are to take from its blood,” Nachmanides, in exploring the rationale of this legislation, writes that seeing the zodiac sign of the lamb is at the peak of its power during the month of Nissan as it is the sign symbolising growing vegetation, G’d ordered the lamb to be slaughtered during this month to demonstrate that this animal that they considered their symbol of success could not even protect itself, much less those who worshipped it. Moreover, the death of the lambs proved that the Exodus of the Jewish people did not occur thanks to the mazzal of the lamb (whom the Israelites had served also) but that it had been orchestrated by a higher power, by Hashem.