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 126 — A Song of degrees.
When the LORD turned again the captivity of Zion, we were like them that dream.
Then was our mouth filled with laughter, and our tongue with singing: then said they among the heathen, The LORD hath done great things for them.
The LORD hath done great things for us; whereof we are glad.
Turn again our captivity, O LORD, as the streams in the south.
They that sow in tears shall reap in joy.
He that goeth forth and weepeth, bearing precious seed, shall doubtless come again with rejoicing, bringing his sheaves with him.