And he shall kill the bullock. After having made the presentation, the offerer proceeds to the second part of the sacrifice, the immolation or slaying, which was to be performed before the Lord, that is, in front of the tabernacle, on the north side of the brazen altar.
Then follows the third part of the sacrifice: the priests, Aaron's sons, shall bring the blood, and sprinkle the blood round about upon the altar. The priests caught the blood (sometimes the Levites were allowed to do this, 2 Chronicles 30:16), and sprinkled or rather threw it round about on the altar, that is, so as to touch all the inner sides of the altar.
"A red line all round the middle of the altar marked that above it the blood of sacrifices intended to be eaten, below it that of sacrifices wholly consumed, was to be sprinkled" (Edersheim, 'The Temple').
This was in some respects the most essential part of the ceremony, the blood representing the life (Leviticus 17:11), which was symbolically received at the hands of the offerer, and presented by the priests to God.
In the antitype our Lord exercised the function of the sacrificing priest when he presented his own life to the Father, as he hung upon the altar of the cross.