And thou shalt make an altar. God now issues His commands respecting the altar of burnt incense, whereby the people were assured that the odor of the worship under the Law was sweet to Him. This ceremony indeed also prevailed among the Gentiles; whence there is frequent mention made by heathen authors of incense-burning; but what its object was they knew not themselves, nor did they care to reflect upon its proper intention, since they conceived themselves to have done all that was required of them, by the bare sign itself. In this way, however, God would encourage His believing people, by giving them to know that the worship which they offered at this command sent up to him a sweet savor. Meanwhile He admonished them diligently to beware lest any uncleanness should profane their sacrifices, but that they should come cleansed and pure into His sight. And David applies this type specially to prayer, when he says: "Let my prayer be set forth before thee as incense." (Psalm 131:2.) Therefore, as the other altar of which we have been hearing, was devoted to the victims for the purpose of propitiating God, so also this altar perfumed the sacrifices with the odor of its incense, that they might be acceptable to God. Hence it was placed near the ark of the testimony, though with the vail between, that its savor might ascend directly to God without any let or hindrance. There is no ambiguity in the words, except that some think there is a repetition where it is said, "every morning," and "between the two evens;" [1] others suppose that there are two separate oblations, and this latter view is the more probable, i.e., that the incense was offered morning and evening. He afterwards forbids either the altar itself to be transferred to other uses, or any other kind of incense to be burnt upon it; of this he will speak elsewhere.

Footnotes

1 - A. V., Margin, ver. 8.

Exodus 37:25-28; Exodus 40:26-27. The altar of incense was to be a casing of boards of shittim wood Exodus 25:5, Exodus 25:18 inches square and three feet in height (taking the cubit as 18 inches), entirely covered with plates of gold. Four "horns" were to project upward at the corners like those of the altar of burnt-offering Exodus 27:2. A crown or moulding of gold was to run round the top. On each of two opposite sides there was to be a gold ring through which the staves were to be put when it was moved from place to place.

Altar to burn incense - The Samaritan omits the ten first verses of this chapter, because it inserts them after Exodus 26:32 (note).
Shittim wood - The same of which the preceding articles were made, because it was abundant in those parts, and because it was very durable; hence everywhere the Septuagint translation, which was made in Egypt, renders the original by ξυλον ασηπτον, incorruptible wood.

And thou shalt make an altar (a) to burn incense upon: [of] shittim wood shalt thou make it.
(a) Upon which the sweet perfume was burnt, (Exodus 30:34).

And thou shalt make an altar to burn incense upon,.... The Targums of Onkelos and Jonathan call it incense of spices, properly enough, for it was made of various spices; of which see Exodus 30:34 and this was necessary on a natural and civil account, to remove those ill smells from the sanctuary, occasioned by the number of beasts continually slain in it; but chiefly on a religions account, to denote the acceptableness of the service of the sanctuary to God:
of shittim wood shall thou make it: of the same that the altar of burnt offering was made, which was covered with brass, but this with gold, as after related; of this sort of wood; see Gill on Exodus 25:5 as this altar was a type of Christ, the shittim wood may respect his human nature; which wood, though it sprung out of the earth, was not common, but choice and excellent, and very strong durable, and incorruptible; and so Christ, though he was man made of an earthly woman in his human nature, yet was chosen out of the people, is the chiefest among ten thousand, and excellent as the cedars, the man of God's right hand, whom he made strong for himself; and though he died in it, he saw no corruption, he now lives, and will live for evermore; in which nature he acts the part of a Mediator, and intercedes for his people, and offers up their prayers, perfumed with the much incense of his mediation, to which this altar has a special respect.

The altar of incense represented the Son of God in his human nature, and the incense burned thereon typified his pleading for his people. The continual intercession of Christ was represented by the daily burning of incense thereon, morning and evening. Once every year the blood of the atonement was to be applied to it, denoting that the intercession of Christ has all its virtue from his sufferings on earth, and that we need no other sacrifice or intercessor but Christ alone.

THE ALTAR OF INCENSE. (Exodus. 30:1-38)
thou shalt make an altar to burn incense upon, &c.--Its material was to be like that of the ark of the testimony, but its dimensions very small [Exodus 25:10].

The Altar of Incense and Incense-Offering bring the directions concerning the sanctuary to a close. What follows, from Ex 30:11-31:17, is shown to be merely supplementary to the larger whole by the formula "and Jehovah spake unto Moses," with which every separate command is introduced (cf. Exodus 30:11, Exodus 30:17, Exodus 30:22, Exodus 30:24, Exodus 31:1, Exodus 31:12).

The altar of incense was to be about a yard high, and half a yard square, with horns at the corners, a golden cornish round it, with rings and staves of gold for the convenience of carrying it, Exodus 30:1-5. It doth not appear that there was any grate to this altar for the ashes to fall into, that they might be taken away; but when they burn incense, a golden censer was brought, with coals in it, and placed upon the altar, and in that censer the incense was burnt, and with it all the coals were taken away, so that no coals or ashes fell upon the altar. The altar of incense in Ezekiel's temple is double to what it is here, Ezekiel 41:22, and it is there called an altar of wood, and there is no mention of gold, to signify that the incense in gospel times should be spiritual, the worship plain, and the service of God enlarged. It was placed before the veil, on the outside of that partition, but before the mercy - seat, which was within the veil. For though he that ministered at that altar could not see the mercy - seat, the veil interposing, yet he must look towards it, and direct his incense that way, to teach us, that though we cannot with our bodily eyes see the throne of grace, that blessed mercy - seat, yet we must in prayer by faith set ourselves before it, direct our prayer and look up.