Albert Barnes Commentary Zephaniah 3:19

"Behold, at that time I will deal with all them that afflict thee; and I will save that which is lame, and gather that which was driven away; and I will make them a praise and a name, whose shame hath been in all the earth." — Zephaniah 3:19 (ASV)

Behold, at that time I will undo - (Literally, I deal with). While God does not punish, He seems to sit still (Isaiah 18:4), be silent (Habakkuk 1:13), or be asleep (Psalms 44:23). Then He will act; He will “deal” according to their deserts with “all”—evil men or devils—all that afflict thee, His Church.

The prophecy looked for a larger fulfillment than the destruction of Jerusalem, since the Romans who, in God’s Hands, avenged the blood of His saints, themselves were among those who “afflicted her.”

And I will save her that halteth ()—the flock or sheep (as Dionysius says, “imperfect in virtue and with trembling faith”)—and gather, like a good and tender shepherd, her that was driven out ; scattered and dispersed through persecutions. All infirmities within will be healed, and all troubles without will be removed.

And I will get them praise and fame - (Literally, I will make them a praise and a name) in every land where they have been put to shame.

Throughout the whole world they have been the offscourings of all things (1 Corinthians 4:13); throughout the whole world their praise should be, as it is said, Thou shalt make them princes in all lands (Psalms 45:16).

One of themselves says, For ye see your calling, brethren, how that not many wise men after the flesh, not many mighty, not many noble, are called. But God hath chosen the foolish things of the world to confound the wise; and God hath chosen the weak things of the world to confound the things which are mighty; and base things of this world, and things which are despised, hath God chosen, yea, and things which are not, to bring to nought things that are (1 Corinthians 1:26–28).

Rupertus says: “These He makes a praise and a name there, where they were without name and disparaged, confounding by them and bringing to nothing those wise and strong and mighty, in whose sight they were contemptible.”