The Book of Psalms is canonical in Judaism (Ketuvim) and Christianity (Old Testament), with its authority confirmed by ancient manuscripts (Qumran), the New Testament, and councils (Hippo, Carthage). The Ethiopian Orthodox Tewahedo Church, however, has a broader canon that includes Psalm 151 as an integral part of the Psalter, accepted as Holy Scripture also by Orthodox, Syriac, and Armenian traditions, demonstrating the historical diversity of biblical canons.
Psalms
Chapter 47 — To the chief Musician, A Psalm for the sons of Korah.
O clap your hands, all ye people; shout unto God with the voice of triumph.
For the LORD most high is terrible; he is a great King over all the earth.
He shall subdue the people under us, and the nations under our feet.
He shall choose our inheritance for us, the excellency of Jacob whom he loved. Selah.
God is gone up with a shout, the LORD with the sound of a trumpet.
Sing praises to God, sing praises: sing praises unto our King, sing praises.
For God is the King of all the earth: sing ye praises with understanding.
God reigneth over the heathen: God sitteth upon the throne of his holiness.
The princes of the people are gathered together, even the people of the God of Abraham: for the shields of the earth belong unto God: he is greatly exalted.