Romans 2:5

But after thy hardness and impenitent heart
The apostle goes on to show, that such persons who promise themselves impunity on the score of prosperity, shall not always go unobserved and unpunished; for there is a day of wrath and righteous judgment hastening on, and will take place after they have filled up the measure of their iniquity. There is a natural "hardness" of the heart in every son and daughter of Adam; and there is an acquired habitual hardness, which is increased by sinning; and a judicial one, which God, for sin, sometimes gives persons up unto. An "impenitent heart" is not only an heart which does not repent, but such an one as cannot repent, being harder than the nether millstone. Now men, by such hardness and impenitence,

treasure up unto [themselves] wrath:
they are the authors of their own destruction; by which is meant the wrath of God, in opposition to the riches of his goodness, despised by them; and is in reserve for wicked men: and is laid up

against,
and will be brought forth in

the day of wrath;
which the Scriptures call "the evil day", ( Amos 6:3 ) ( Ephesians 6:13 ) ; the day fixed by God, when he will call men to an account for their sins, and stir up all his wrath against them:

and revelation;
that is, the day of revelation, when Christ shall be revealed from heaven in flames of fire, the sins of men shall be revealed, and the wrath of God against them:

of the righteous judgment of God;
so some copies read; that is, the day of the righteous judgment; so the Arabic version reads, "and of the appearance of God, and of his righteous judgment"; for the judgment will be at the appearance of Christ, who is God, and at his kingdom, ( 2 Timothy 4:1 ) . The Alexandrian copy reads, "and of the retribution of the righteous judgment of God"; and so the Ethiopic version seems to have read, rendering the words, "if so", or "seeing thy retribution may come upon thee", and "if the judgment of God may befall thee"; for when the judgment of God shall come, as there will be a revelation of men's sins, and of the wrath of God against them, there will be a just retribution according to their works. Or "the revelation of the righteous judgment of God"; that is, when the judgment of God, which is now hid, shall appear; and which is said to be "righteous", because it will be carried on in a righteous manner, and proceed upon, and be executed according to the strictest rules of justice and equity.