This psalm is by some ascribed to Moses, by others to David, which
latter is more probable; with which agree the Septuagint, Vulgate
Latin, and all the Oriental versions; all which, excepting the Syriac
and Arabic versions, say it is a psalm that was made to be sung the
day before the sabbath; and it was a custom with the Jews {a} to sing
it on the sixth day of the week; which it is likely the authors of
the Septuagint version were acquainted with, and therefore inserted
it in the title of the psalm, though it is not in the Hebrew text.
The subject of the psalm is the kingdom of God; not of nature and
providence, but of grace; the kingdom of the Messiah; of the
certainty, firmness, and eternity of it, notwithstanding the
opposition of mighty enemies; being established by the sure promises
of God, which his faithfulness and holiness were engaged to make
good. Kimchi says, that all these psalms, this and the following to
Psalm 101, are concerning the Messiah; and so say Kabvenaki and Ben