For, behold, the day cometh, that shall {a} burn as an oven; and all the proud, yea, and all that do wickedly, shall be stubble: and the day that cometh shall burn them up, saith the LORD of hosts, that it shall leave them neither root nor branch.

(a) He prophesies of God's judgments against the wicked, who would not receive Christ, when God would send him for the restoration of his Church.

Wesley's Notes

4:1 Cometh - Tho' it be at a distance from you, yet it is coming and will overtake you and overwhelm you too. As an oven - The refiner's fire, chap. 3:2, is now represented as a fire, burning more dreadfully, as it did indeed when Jerusalem and the temple were on fire, when the fire raged every where, but most fiercely where the arched roofs made it double itself, and infold flames with flames. And this may well be an emblem of the day of judgment.

Jamieson-Fausset-Brown Bible Commentary

CHAPTER 4

Mal 4:1-6. God's Coming Judgment: Triumph of the Godly: Return to the law THE Best Preparation for Jehovah's Coming: Elijah's Preparatory Mission of Reformation.

1. the day cometh . burn-(Mal 3:2; 2Pe 3:7). Primarily is meant the judgment coming on Jerusalem; but as this will not exhaust the meaning, without supposing what is inadmissible in Scripture-exaggeration-the final and full accomplishment, of which the former was the earnest, is the day of general judgment. This principle of interpretation is not double, but successive fulfilment. The language is abrupt, "Behold, the day cometh! It burns like a furnace." The abruptness imparts terrible reality to the picture, as if it suddenly burst on the prophet's view.

all the proud-in opposition to the cavil above (Mal 3:15), "now we call the proud (haughty despisers of God) happy."

stubble-(Ob 18; Mt 3:12). As Canaan, the inheritance of the Israelites, was prepared for their possession by purging out the heathen, so judgment on the apostates shall usher in the entrance of the saints upon the Lord's inheritance, of which Canaan is the type-not heaven, but earth to its utmost bounds (Ps 2:8) purged of all things that offend (Mt 13:41), which are to be "gathered out of His kingdom," the scene of the judgment being that also of the kingdom. The present dispensation is a spiritual kingdom, parenthetical between the Jews' literal kingdom and its antitype, the coming literal kingdom of the Lord Jesus.

neither root nor branch-proverbial for utter destruction (Am 2:9).

Matthew Henry's Concise Commentary

4:1-3 Here is a reference to the first and to the second coming of Christ: God has fixed the day of both. Those who do wickedly, who do not fear God's anger, shall feel it. It is certainly to be applied to the day of judgment, when Christ shall be revealed in flaming fire; to execute judgment on the proud, and all that do wickedly. In both, Christ is a rejoicing Light to those who serve him faithfully. By the Sun of Righteousness we understand Jesus Christ. Through him believers are justified and sanctified, and so are brought to see light. His influences render the sinner holy, joyful, and fruitful. It is applicable to the graces and comforts of the Holy Spirit, brought into the souls of men. Christ gave the Spirit to those who are his, to shine in their hearts, and to be a Comforter to them, a Sun and a Shield. That day which to the wicked will burn as an oven, will to the righteous be bright as the morning; it is what they wait for, more than those that wait for the morning. Christ came as the Sun, to bring, not only light to a dark world, but health to a distempered world. Souls shall increase in knowledge and spiritual strength. Their growth is as that of calves of the stall, not as the flower of the field, which is slender and weak, and soon withers. The saints' triumphs are all owing to God's victories; it is not they that do this, but God who does it for them. Behold another day is coming, far more dreadful to all that work wickedness than any which is gone before. How great then the happiness of the believer, when he goes from the darkness and misery of this world, to rejoice in the Lord for evermore!