Reading the Order of Sacrifices Counts as Offering Them

Rabbi Yose said: Were it not for the [sacrificial] watch-stations, heaven and earth would not endure, as it is said, "And he said, O Lord GOD, by what shall I know" (Genesis 15:8). Abraham said before the Holy One, blessed be He, "Master of the universe, perhaps, God forbid, Israel will sin and You will do to them as to the generation of the flood and the generation of the dispersion?" He said to him, "No." "By what shall I know?" He said to him, "Take Me a heifer of three" (Genesis 15:9). He said before Him, "This is well at the time when the Temple stands; at the time when the Temple does not stand, what shall become of them?" He said to him, "I have already established for them the order of sacrifices. Whenever they read in them, I will reckon it for them as though they had offered a sacrifice before Me, and I will forgive them for all their iniquities."