Commentaries:
Jamieson, Fausset, and Brown
The prophet now turns to Judah; a gracious promise to the remnant ("residue"); a warning lest through like sins Judah should share the fate of Samaria.
crown—in antithesis to the "fading crown" of Ephraim (Isaiah 28:1, Isaiah 28:3).
the residue—primarily, Judah, in the prosperous reign of Hezekiah (II Kings 18:7), antitypically, the elect of God; as He here is called their "crown and diadem," so are they called His (Isaiah 62:3); a beautiful reciprocity.
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