Psalm 18:5
Their sound went forth into all the earth; and their words to the ends of the world.
Haydock
Verse 5. Sound. So, S. Paul reads this text, though the Heb. have, “line.” Yet there is no reason why we should suppose that the Sept. read differently, or that the Jews have corrupted their copies, as t hey could derive no advantage from so doing (Bert.) here, unless it were to discredit the apostle; as infidels assert the truth of the Old Testament, to vilify the new. Kum (H.) may signify a “line,” (Bert.) or “writing.” Abenezra. — The greatest exactitude has been observed in forming the world, as if all had been measured by an architect. But the sense of the Vulg. is preferable, and is adopted by Sym. S. Jer. and the Syr. C. — Prot. “their line.” Marg. “their rule or direction.” Kolam, “their voice,” occurs in the preceding verse. The l might easily be lost, (H.) or omitted by a poetical licence. Genebrard. M. — Their, refers to the heavens representing the apostles, as S. Paul explains this text, to prove that all were inexcusable who would not believe the gospel. Bert.
Denzinger
149: The Primacy of the Roman Pontiff
From the epistles of the Synod "Repletum est gaudio" to Leo the Pope, at the beginning of November, 451
For if where two or three are gathered together in his name, there he says he is in the midst of them [cf. Matt. 18:20], how great an intimacy will He show in regard to the five hundred and twenty priests, who have preferred to both native land and to labor the knowledge of confession for Him. Over these you ruled as a head over the members, among those holding office, displaying your good will.