Thou shalt make an altar - מזבח mizbeach, from זבח zabach, to slay: Septuagint, θυσιαστηριον, from θυσιαζω, to sacrifice or from θυω to kill, etc. See Clarke's note on Genesis 8:20.

Four square - As this altar was five cubits long and five broad, and the cubit is reckoned to be twenty-one inches, hence it must have been eight feet nine inches square, and about five feet three inches in height, the amount of three cubits, taken at the same ratio.

And thou shall make an altar of shittim wood,.... This is a different altar from that made of earth before the tabernacle was built, Exodus 20:24 and from the altar of incense, Exodus 30:1 this was to offer burnt offerings on, and was placed at the door of the tabernacle, in the court of the people, where they brought their sacrifices to the priests to offer for them: it stood in the open air, as it was proper it should, that the smoke or the sacrifices might ascend up and scatter. This altar was not typical of the altar of the heart; though indeed all the saints are priests, and every sacrifice of theirs should come from the heart, and particularly love, which is more than all burnt offerings; but the heart is not this altar of brass to bear the fire of divine wrath, which none can endure; nor does it sanctify the gift, it being itself impure: nor of the Lord's table, or the table on which the Lord's supper is set; that is a table, and not an altar, a feast, and not a sacrifice; is not greater than the gift, nor does it sanctify: nor of the cross or Christ, on which he died, bore the sins or his people, and sanctified them by his blood; but of Christ himself, who by his office as a priest, his human nature is the sacrifice, and his divine nature the altar; and he is that altar believers in him have a right to eat of, Hebrews 13:10 his divine nature is greater than the human, is the support of it, which sanctifies and gives it virtue as a sacrifice, and which makes the sacrifices of all his people acceptable to God. This altar of burnt offering is said to be made of "shittim wood", a wood incorruptible and durable; Christ, as God, is from everlasting to everlasting; as man, though he once died, he now lives for evermore, and never did or will see corruption; his priesthood is an unchangeable priesthood, and passes not from one to another, and particularly his sacrifice is of a continual virtue and efficacy:

five cubits long, and five cubits broad: the altar shall be square: as to the length and breadth of it, which were alike, two yards and a half each, according to the common notion of a cubit. The altars of the Heathens were made in imitation of this, they were square as this was. Pausanias makes mention of an altar of Diana, that was "square", sensibly rising up on high. And this figure may denote the perfection of Christ's sacrifice, and the permanency of it; though the altars in Solomon's temple, and in the visions of Ezekiel, are much larger, and which also were square, 2 Chronicles 4:1. Christ's sacrifice is large and extensive, making satisfaction for all his people, and for all their sins; and he is an altar large enough for all their sacrifices to be offered up to God with acceptance:

and the height thereof shall be three cubits; a proper height for a man to minister at; for as Aben Ezra observes, the height of a man is but four cubits ordinarily; so that a man serving at the altar would be a cubit, or half a yard more above it, and would have command of doing on it what he had to do.

The Altar of Burnt-Offering (cf. Exodus 38:1-7). - "Make the altar (the altar of burnt-offering, according to Exodus 38:1) of acacia-wood, five cubits long, and five cubits broad (רבוּע "foured," i.e., four-sided or quadrangular), and three cubits high. At its four corners shall its horns be from (out of) it," i.e., not removable, but as if growing out of it. These horns were projections at the corners of the altar, formed to imitate in all probability the horns of oxen, and in these the whole force of the altar was concentrated. The blood of the sin-offering was therefore smeared upon them (Leviticus 4:7), and those who fled to the altar to save their lives laid hold of them (vid., Exodus 21:14, and 1 Kings 1:50; also my commentary on the passage). The altar was to be covered with copper or brass, and all the things used in connection with it were to be made of brass. These were, - (1) the pans, to cleanse it of the ashes of the fat (Exodus 27:3 : דּשּׁן, a denom. verb from דּשׁן the ashes of fat, that is to say, the ashes that arose from burning the flesh of the sacrifice upon the altar, has a privative meaning, and signifies "to ash away," i.e., to cleanse from ashes); (2) יעים shovels, from יעה to take away (Isaiah 28:17); (3) מזרקות, things used for sprinkling the blood, from fzarq to sprinkle; (4) מזלגות forks, flesh-hooks (cf. מזלג 1 Samuel 3:13); (5) מחתּת coal-scoops (cf. Exodus 25:38). וגו לכל־כּליו: either "for all the vessels thereof thou shalt make brass," or "as for all its vessels, thou shalt make (them) of brass."

And thou shalt make an {a} altar of shittim wood, five cubits long, and five cubits broad; the altar shall be foursquare: and the height thereof shall be three cubits.

(a) For the burnt offering.

27:1 As God intended in the tabernacle to manifest his presence among his people, so there they were to pay their devotions to him; not in the tabernacle itself, into that only the priests entered as God's domestic servants, but in the court before the tabernacle, where, as common subjects they attended. There an altar was ordered so be set up, to which they must bring their sacrifices; and this altar was to sanctify their gifts; from hence they were to present their services to God, as from the mercy - seat he gave his oracles to them; and thus a communion was settled between God and Israel.

[2] altar

Brazen altar, type of the Cross upon which Christ, our whole burnt-offering offered Himself without spot to God Heb 9:14.

[3] height (Cf) Ex 25:10. The altar of burnt offering is double the height of the mercy-seat. The atonement more than saves us-- it glorifies God Jn 17:14.

Margin shittim i.e. acacia.

Margin wood The wood (Christ's humanity), completely inclosed in brass, must have become completely charred by sacrificial fires. Cf. Heb 10:5-7.

CHAPTER 27

Ex 27:1-21. Altar for Burnt Offering.

1, 2. altar of shittim wood-The dimensions of this altar which was placed at the entrance of the sanctuary were nearly three yards square, and a yard and a half in height. Under the wooden frame of this chest-like altar the inside was hollow, and each corner was to be terminated by "horns"-angular projections, perpendicular or oblique, in the form of horns. The animals to be sacrificed were bound to these (Ps 118:27), and part of the blood was applied to them.

27:1-8 In the court before the tabernacle, where the people attended, was an altar, to which they must bring their sacrifices, and on which their priests must offer them to God. It was of wood overlaid with brass. A grate of brass was let into the hollow of the altar, about the middle of which the fire was kept, and the sacrifice burnt. It was made of net-work like a sieve, and hung hollow, that the ashes might fall through. This brazen altar was a type of Christ dying to make atonement for our sins. The wood had been consumed by the fire from heaven, if it had not been secured by the brass: nor could the human nature of Christ have borne the wrath of God, if it had not been supported by Divine power.