You are to take some of its blood and put it on the four horns of the altar, on the four corners of the ledge, and all around the rim; thus you will cleanse the altar and make atonement for it.
This relates to the altar in this mystical temple, and that is mystical too; for Christ is our altar. The Jews, after their return out of captivity, had an altar long before they had a temple, Ezr 3:3. But this was an altar in the temple. Now here we have, I. The measures of the altar, Eze 43:13.
Commenting on Ezekiel 43:13-27
And thou shalt take of the blood thereof,.... Ezekiel being a priest. This must be understood in a visionary way; for, as Kimchi observes, Ezekiel did not live to come up out of the captivity, but died, and was buried in the land of Babylon, and so did not actually do this: though it is a mere dream of the same writer, that this is...
cleanse--literally, "make expiation for."