Exodus 27:1

“And thou shall make an altar of shittim wood, etc.] This is a different altar from that made of earth before the tabernacle was built, (<022024>Exodus 20:24) and from the altar of incense, (<023001>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…”

“ALTAR FOR BURNT OFFERING. (Exo. 27:1-21) 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 (Psa 118:27), and part of the blood was applied to them.”

“(Compare Exodus 38:1-7.) The great altar which stood in the court immediately in front of the tabernacle was commonly called the altar of burnt-offering, because on it were burnt the whole burnt-offerings, and all those parts of the other animal sacrifices which were offered to the Lord. It was also called the brazen altar, because it was covered with bronze, in distinction from the golden altar or altar of incense Exodus 39:38-39; Exodus 40:5-6. Exodus 27:2 His horns shall be of the same - These horns were projections pointing upward in the form either of a small obelisk, or of the horn of an ox. They were to be actually parts of the altar, not merely superadded to it. On them the blood of…”

“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. Exodus 27:2”

“27:1-19 These plans for the altar of burnt offering and the courtyard continue the movement outward from the center. As with the sanctuary, the plans for the furniture of the courtyard are given (27:1-8) before the plans for the courtyard itself (27:9-19). 27:1-8 Like the frames of the Tabernacle, the square altar of burnt offerings was made of acacia wood overlaid with metal. However, in keeping with the other features outside the sanctuary, it was overlaid with bronze (27:2-3; see 27:10, 17, 19).”

“altar of shittim wood: Exo 20:24-26, Exo 24:4, Exo 38:1-7, Exo 40:10, Exo 40:29; Sa2 24:18; Ch2 4:1; Eze 43:13-17; Heb 13:10 Exodus 27:2”

“The Altar of Burnt-Offering (cf. Exo 38:1-7). \- "Make the altar (the altar of burnt-offering, according to Exo 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 ( Lev 4:7), and those who fled to the altar to save their lives laid hold of them (vid., Exo 21:14, and Kg1…”