That is found in Exodus and Numbers.
Now this is that which thou shalt offer upon the altar; two lambs of the first year day by day continually. The one lamb thou shalt offer in the morning; and the other lamb thou shalt offer at even: (Exod 29:38,39)
And thou shalt say unto them, This is the offering made by fire which ye shall offer unto the LORD; two lambs of the first year without spot day by day, for a continual burnt offering. The one lamb shalt thou offer in the morning, and the other lamb shalt thou offer at even; And a tenth part of an ephah of flour for a meat offering, mingled with the fourth part of an hin of beaten oil. It is a continual burnt offering, which was ordained in mount Sinai for a sweet savour, a sacrifice made by fire unto the LORD. (Num 28:3-6)
These lambs represented Christ -- the Lamb of God who is without spot or blemish. While He was om earth, He was in fact a daily sacrifice.
Correct. That's why the Jews had to obey every command given to them concerning sacrifices and holy days. But they decided to worship the idols of the gentiles. Results, war and dispersion.