Mostly it should be psalm 23.
Psalm 23 is most famous as Davids psalm.
Psalm 23 is the most popular Psalm.
The most quated psalm is psalm 23.
The psalms are in the old testament, and the most quoted psalm is psalm 23.
Psalm 107
Psalm 51 is known as Miserere, because it begins with the words "Miserere mei, Deus". Many composers have made their own settings of the psalm, the most famous one may be the one by Gregorio Allegri.
1 The LORD is my shepherd, I shall not be in want.Psalm 23:1, New International Version
Isaac Watts' most famous hymn is "Joy to the World," which is a popular Christmas carol based on Psalm 98 from the Bible. It is widely sung and recognized around the world.
Psalm
Hallelujah
In both Judaism and Christianity, the most famous Psalm of David, is without doubt, Psalm twenty-three, which begins, 'The L*rd is my shepherd, I shall not want.' It prays, asking G*d to walk beside us through the 'Valley of the Shadow of death', where we should fear no evil, for His Rod and Staff are a comfort to us. It tells of G*d anointing us, in preparation for for passing from this earth, into the Heavenly Realms, where we may live with the Chosen who have departed before us. It has also been paraphrased in Christianity into 2 Hymns: 'The L*rd's my Shepherd', usually sung to either the tune 'Crimond' or 'Brother James' Air' and the other; 'The King of Love, my shepherd is' (Tune: Dominus Regit Me). All are extremely popular choices at weddings and funerals, as it the reading of this particular Psalm of David.
The correct term is 23rd. You write 23rd in words like this: twenty-third. King David's most famous poem in the Bible is the twenty-third psalm.