English: “And its blood shall be drained” — just as hakatarah is at the top of the altar, so draining is at the top of the altar.
In the sugya: Mitzuy (draining) is linked by hekesh to the place of hakatarah. Since the burning is at the top of the altar, the draining of the blood that accompanies the process is likewise performed there.
Type of Learning
Hekesh of mitzuy to hakatarah for place.
What Is Learned
Draining of the blood is done at the top of the altar. The comparison to the location of hakatarah transfers the requirement: mitzuy, like the burning, takes place on the upper surface of the mizbe’ach.