All who ascend the Altar ascend toward the right, go around [the Altar], and descend toward the left; except for one who ascends for these three things, who would ascend, and retrace their steps.

How was the [service] of the bird chatas performed? He would perform melikah on its head opposite the back of the skull, without separating; and he would sprinkle its blood upon the wall of the Altar. The remainder of the blood would drain upon the base. The Altar receives only its blood, while all of it goes to the Kohanim.