I’m going through the Tanakh, and I found this interesting verse Jeremiah 7:22-23 .
For when I freed your fathers from the land of Egypt, I did not speak with them or command them concerning burnt offerings or sacrifice. But this is what I commanded them: Do My bidding, that I may be your God and you may be My people; walk only in the way that I enjoin upon you, that it may go well with you.
I find this an interesting observation…that the sacrificial system was not even originally a part of “The Plan” so to speak.