Psalm 2:8
Ask of Me and I will give Thee the nations for Thine inheritance, and the ends of the earth for Thy possession.
Haydock
Verse 8. Ask. The Messias must be invested with human nature, and merit all graces for man. When did David ask for such an extensive dominion? Berthier. — But Christ’s kingdom extends over the world. His Church cannot fail, as S. Aug. proved hence against the Donatists, and his arguments confute Protestants as well. W. — Our doctors used to refer this psalm to the Messias, said R. Solomon; but it is better to apply it to David, on account of “Christians.” D.
Denzinger
2133: The Authors and the Time of the Composition of the Psalms
Reply of the Biblical Commission, May 1, 1910
Question V: Whether in appearance the Davidian origin can be denied to those psalms which are cited in the Old and New Testament distinctly under the name of David, among which to be considered before the rest come: psalm 2, Quare fremuerunt gentes; psalm 15, Conserva me, Domine; psalm 17 Diligam te, Domine, fortitudo mea; psalm 31, Beati, Quorum remissae sunt iniquitates; psalm 68, Salvum me fac, Deus; psalm 109, Dixit Dominus Domino meo?–Reply: In the negative.