The inscription of this psalm in the Syriac version is,

``it is said concerning those of the house (or the companions)
of Ananias, when they came out of the furnace; likewise it
foretells the calling of the Gentiles by the declaration of
the Gospel.''

Which last is right; for the apostle has quoted it, to prove the
Gentiles should glorify God for his mercy, \\#Ro 15:9,11\\. Aben Ezra
thinks it concerns only the nations subdued by David; but he quotes R.
Moseh, as of opinion that all nations are comprehended: and Kimchi
affirms that the psalm belongs to the times of the Messiah; and
supposes there is a mystery in its consisting of two verses only; and
that it intimates that in those times there will be two people that
will serve the Lord; Israel, with the law; and the Gentiles, with the
seven precepts of Noah. It certainly refers to Gospel times, and to the
conversion of the Gentiles; and when Jews and Gentiles should make one
people, and be partakers of the same privileges and blessings; receive
the same doctrines, submit to the same ordinances, and be under the
same law, to Christ their King.