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 87 — A Psalm or Song for the sons of Korah.
His foundation is in the holy mountains.
The LORD loveth the gates of Zion more than all the dwellings of Jacob.
Glorious things are spoken of thee, O city of God. Selah.
I will make mention of Rahab and Babylon to them that know me: behold Philistia, and Tyre, with Ethiopia; this man was born there.
And of Zion it shall be said, This and that man was born in her: and the highest himself shall establish her.
The LORD shall count, when he writeth up the people, that this man was born there. Selah.
As well the singers as the players on instruments shall be there: all my springs are in thee.