Isaiah 55:4-5

4 Look, I made him a witness to nations,
Ideally the Davidic king was to testify to the nations of God’s greatness (cf. Pss 18:50 HT [18:49 ET]; 22:28 HT [22:27 ET]). See J. H. Eaton, Kingship in the Psalms (SBT), 182–84.

a ruler and commander of nations.”
5 Look, you will summon nations
Heb “a nation,” but the singular is collective here, as the plural verbs in the next line indicate (note that both “know” and “run” are third plural forms).
you did not previously know;
nations
Heb “a nation,” but the singular is collective here, as the plural verbs that follow indicate.
that did not previously know you will run to you,
because of the Lord your God,
the Holy One of Israel,
See the note on the phrase “the Holy One of Israel” in 1:4.

for he bestows honor on you.
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