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 36 — To the chief Musician, A Psalm of David the servant of the LORD.
The transgression of the wicked saith within my heart, that there is no fear of God before his eyes.
For he flattereth himself in his own eyes, until his iniquity be found to be hateful.
The words of his mouth are iniquity and deceit: he hath left off to be wise, and to do good.
He deviseth mischief upon his bed; he setteth himself in a way that is not good; he abhorreth not evil.
Thy mercy, O LORD, is in the heavens; and thy faithfulness reacheth unto the clouds.
Thy righteousness is like the great mountains; thy judgments are a great deep: O LORD, thou preservest man and beast.
How excellent is thy lovingkindness, O God! therefore the children of men put their trust under the shadow of thy wings.
They shall be abundantly satisfied with the fatness of thy house; and thou shalt make them drink of the river of thy pleasures.
For with thee is the fountain of life: in thy light shall we see light.
O continue thy lovingkindness unto them that know thee; and thy righteousness to the upright in heart.
Let not the foot of pride come against me, and let not the hand of the wicked remove me.
There are the workers of iniquity fallen: they are cast down, and shall not be able to rise.