And it came to pass on the morrow,.... The eighteenth day of Tammuz it was, the same writers say, that Moses implored the mercy of God for Israel. Jarchi on Exodus 32:11 says it was on the seventeenth day the tables were broke, on the eighteenth the calf was burnt, and on the nineteenth that Moses went up to intercede for them:

that Moses said unto the people, ye have sinned a great sin; the sin of idolatry, see Exodus 32:21 from whence it appears, that all that were guilty of it were not slain, perhaps only some of one tribe; and there was great reason to fear, that as wrath was gone forth it would not stop here, but others would fall a sacrifice to the divine displeasure; wherefore it is proposed by Moses to make application to the Lord on their behalf, that they might obtain mercy:

and I will go up unto the Lord: on the top of Mount Sinai:

peradventure I shall make atonement for your sin; not by any sacrifice offered, but by his prayers prevail with God to forgive their sin, and not punish any more for it: he had by his first prayer obtained of the Lord not to consume them off of the face of the earth, and utterly destroy them as a nation; but that he did not hinder but that resentment might be shown in a lesser degree, or by parts; as not 3000 men had been cut off, chiefly out of one tribe, if not altogether, the rest of the tribes might expect to be visited, according to the number of their delinquents.

After Moses had thus avenged the honour of the Lord upon the sinful nation, he returned the next day to Jehovah as a mediator, who is not a mediator of one (Galatians 3:20), that by the force of his intercession he might turn the divine wrath, which threatened destruction, into sparing grace and compassion, and that he might expiate the sin of the nation. He had received no assurance of mercy in reply to his first entreaty (Exodus 32:11-13). He therefore announced his intention to the people in these words: "Peradventure I can make an atonement for your sin." But to the Lord he said (Exodus 32:31, Exodus 32:32), "The sin of this people is a great sin; they have made themselves a god of gold," in opposition to the clear commandment in Exodus 20:23 : "and now, if Thou wilt forgive their sin, and if not, blot me out of the book that Thou hast written." The book which Jehovah has written is the book of life, or of the living (Psalm 69:29; Daniel 12:1). This expression is founded upon the custom of writing the names of the burgesses of a town or country in a burgess-list, whereby they are recognised as natives of the country, or citizens of the city, and all the privileges of citizenship are secured to them. The book of life contains the list of the righteous (Psalm 69:29), and ensures to those whose names are written there, life before God, first in the earthly kingdom of God, and then eternal life also, according to the knowledge of salvation, which keeps pace with the progress of divine revelation, e.g., in the New Testament, where the heirs of eternal life are found written in the book of life (Philippians 4:3; Revelation 3:5; Revelation 13:8, etc.), - an advance for which the way was already prepared by Isaiah 4:3 and Daniel 12:1. To blot out of Jehovah's book, therefore, is to cut off from fellowship with the living God, or from the kingdom of those who live before God, and to deliver over to death. As a true mediator of his people, Moses was ready to stake his own life for the deliverance of the nation, and not to live before God himself, if Jehovah did not forgive the people their sin. These words of Moses were the strongest expression of devoted, self-sacrificing love. And they were just as deep and true as the wish expressed by the Apostle Paul in Romans 9:3, that he might be accursed from Christ for the sake of his brethren according to the flesh. Bengel compares this wish of the apostle to the prayer of Moses, and says with regard to this unbounded fulness of love, "It is not easy to estimate the measure of love in a Moses and a Paul; for the narrow boundary of our reasoning powers does not comprehend it, as the little child is unable to comprehend the courage of warlike heroes" (Eng. Tr.). The infinite love of God is unable to withstand the importunity of such love. God, who is holy love, cannot sacrifice the righteous and good for the unrighteous and guilty, nor can He refuse the mediatorial intercession of His faithful servant, so long as the sinful nation has not filled up the measure of its guilt, in which case even the intercession of a Moses and a Samuel would not be able to avert the judgment (Jeremiah 15:1, cf. Ezekiel 14:16). Hence, although Jehovah puts back the wish and prayer of Moses with the words, "Whoever (אשׁר מי, both here and in 2 Samuel 20:11, is more emphatic than either one or the other alone) has sinned, him will I blot out of My book," He yields to the entreaty that He will ensure to Moses the continuance of the nation under His guidance, and under the protection of His angel, which shall go before it (see at Exodus 33:2-3), and defer the punishment of their sin until the day of His visitation.

And it came to pass on the morrow, that Moses said unto the people, Ye have sinned a great sin: and now I will go up unto the LORD; peradventure I shall make an atonement for your sin.

Margin atonement

See Scofield Note: "Ex 29:33".

30-33. Moses said unto the people, Ye have sinned a great sin-Moses labored to show the people the heinous nature of their sin, and to bring them to repentance. But not content with that, he hastened more earnestly to intercede for them.

32:30-35 Moses calls it a great sin. The work of ministers is to show people the greatness of their sins. The great evil of sin appears in the price of pardon. Moses pleads with God for mercy; he came not to make excuses, but to make atonement. We are not to suppose that Moses means that he would be willing to perish for ever, for the people's sake. We are to love our neighbour as ourselves, and not more than ourselves. But having that mind which was in Christ, he was willing to lay down his life in the most painful manner, if he might thereby preserve the people. Moses could not wholly turn away the wrath of God; which shows that the law of Moses was not able to reconcile men to God, and to perfect our peace with him. In Christ alone, God so pardons sin as to remember it no more. From this history we see, that no unhumbled, carnal heart, can long endure the holy precepts, the humbling truths, and the spiritual worship of God. But a god, a priest, a worship, a doctrine, and a sacrifice, suited to the carnal mind, will ever meet with abundance of worshippers. The very gospel itself may be so perverted as to suit a worldly taste. Well is it for us, that the Prophet like unto Moses, but who is beyond compare more powerful and merciful, has made atonement for our souls, and now intercedes in our behalf. Let us rejoice in his grace.