(5) Aaron . . . built an altar before it.--Having once yielded to the popular cry. Aaron was carried on from one compliance to another. He caused the mould to be made for the idol, and the gold to be melted and run into it; and now he constructed, perhaps with his own hands, an altar of rough stones or turf (Exodus 20:24-25), and placed it directly in front of the Image, thus encouraging the offering of sacrifice to it. Perhaps he flattered himself that by heading the movement he could control it, and hinder it from becoming downright apostacy from Jehovah. In his view no doubt the calf was an emblem of Jehovah, and the worship paid it was the worship of Jehovah. Hence the festival which he proclaimed was to be "a feast to Jehovah." But how little able he was to guide events, or to hinder the worst evils of idolatry from speedily manifesting themselves, appears from Exodus 32:6; Exodus 32:25.

Verse 5. - He built an altar before it. Aaron thus proceeded to "follow a multitude to evil" (Exodus 23:2), and encouraged the idolatry which he felt himself powerless to restrain. Still, he did not intend that the people should drift away from the worship of Jehovah, or view the calf as anything but a symbol of him. He therefore made proclamation and said, Tomorrow is a feast to the Lord (literally, "to Jehovah ").

32:1-6 While Moses was in the mount, receiving the law from God, the people made a tumultuous address to Aaron. This giddy multitude were weary of waiting for the return of Moses. Weariness in waiting betrays to many temptations. The Lord must be waited for till he comes, and waited for though he tarry. Let their readiness to part with their ear-rings to make an idol, shame our stubbornness in the service of the true God. They did not draw back on account of the cost of their idolatry; and shall we grudge the expenses of religion? Aaron produced the shape of an ox or calf, giving it some finish with a graving tool. They offered sacrifice to this idol. Having set up an image before them, and so changed the truth of God into a lie, their sacrifices were abomination. Had they not, only a few days before, in this very place, heard the voice of the Lord God speaking to them out of the midst of the fire, Thou shalt not make to thyself any graven image? Had they not themselves solemnly entered into covenant with God, that they would do all he had said to them, and would be obedient? ch. 24:7. Yet before they stirred from the place where this covenant had been solemnly made, they brake an express command, in defiance of an express threatening. It plainly shows, that the law was no more able to make holy, than it was to justify; by it is the knowledge of sin, but not the cure of sin. Aaron was set apart by the Divine appointment to the office of the priesthood; but he, who had once shamed himself so far as to build an altar to a golden calf, must own himself unworthy of the honour of attending at the altar of God, and indebted to free grace alone for it. Thus pride and boasting were silenced.And when Aaron saw it,.... In what form it was, and what a figure it made, and how acceptable it was to the Israelites. The Targums of Jonathan and Jerusalem paraphrase it,"and Aaron saw Hur slain before him;''for reproving them for their idolatry, as the Midrash (e), quoted by Jarchi, says: and Aaron fearing they would take away his life if he opposed them:

he built an altar before it; that sacrifice might be offered on it to it:

and Aaron made proclamation, and said, tomorrow is a feast to the Lord; that is, he gave orders to have it published throughout the camp, there would be solemn sacrifices offered up to the Lord, as represented by this calf, and a feast thereon, which was a public invitation of them to the solemnity: though some think this was a protracting time, and putting the people off till the morrow, who would have been for offering sacrifice immediately, hoping that Moses would come down from the mount before that time, and prevent their idolatry.

(e) So Pirke Eliezer, c. 45.