Ezekiel 43:16

And the altar shall be twelve cubits long, twelve broad,.... The length of it, from east to west, was twelve cubits; and the breadth, from north to south, was the same; so that it was a proper foursquare, as follows: Christ the altar, or the doctrine of his sacrifice and satisfaction for the sins of men, is the doctrine of the twelve apostles of Christ, and embraced by the twelve times twelve, the 144,000 that belong unto him:

square in the four squares thereof; as the altar in the tabernacle, and Solomon's temple, were, Exodus 27:1, denoting the largeness of Christ's sacrifice, the perfection of it, and its stability and permanency, to take away the sin, of his people.