Leviticus 7:2

In the place where they kill the burnt offering shall they
kill the trespass [offering
See ( Leviticus 1:11 ) :

and the blood thereof shall he sprinkle round about upon the altar;
on the upper part of it. There was a scarlet thread that was drawn around the altar in the middle, the blood of some of the sacrifices was sprinkled below it; and some above it, as was the blood of the trespass offering.