We all know the story of the Jews cooking the lamb, eating it, putting the blood on their doors and God then passing over (hense, Passover ) But, lets actually look at the words from the Torah. 

In Shemot Perek י’'ב Pasuk כ'ג (Exodus, Chapter 12, Sentence 23)

"וְעָבַר יְהֹוָה לִנְגֹּף אֶת מִצְרַיִם וְרָאָה אֶת הַדָּם עַל הַמַּשְׁקוֹף וְעַל שְׁתֵּי הַמְּזוּזֹת וּפָסַח יְהֹוָה עַלהַפֶּתַח וְלֹא יִתֵּן הַמַּשְׁחִית לָבֹא אֶל בָּתֵּיכֶם לִנְגֹּף"

The Lord will pass to smite the Egyptians and he will see the blood on the the doorposts, and the Lord will passover the entrance, and He will not permit the destroyer to enter your house to smite you

So God says the the Destroyer will come. But then, we see later, that there is no destroyer that comes. It's God! So what happened to the "destroyer"?

 A) God used coercive power to make sure that the Jews actually  made the Korban Pesach. God simply told them to put the blood on the door post in order for them to do their obligation, make the Korban Pesach.

Chag Sameach!   


haggadah Section: -- Exodus Story
Source: My Teacher