G5568–ψαλμός–psalmos

Why, David himself says in the Book of Psalms, "`The Lord said to my Lord, Sit at My right hand

ψαλμῶν· psalmōn “of Psalms:”

And He said to them, "This is what I told you while I was still with you--that everything must be fulfilled that is written in the Law of Moses and in the Prophets and the Psalms concerning me."

ψαλμοῖς psalmois “in [the] Psalms”

"For it is written in the Book of Psalms, "`Let his encampment be desolate: let there be no one to dwell there'; and "`His work let another take up.'

ψαλμῶν· psalmōn “of Psalms:”

that God has amply fulfilled it to our children in raising up Jesus; as it is also written in the second Psalm, `Thou art My Son: to-day I have become Thy Father.'

ψαλμῷ psalmō “psalm”

What then, brethren? Whenever you assemble, there is not one of you who is not ready either with a song of praise, a sermon, a revelation, a `tongue,' or an interpretation. Let everything be done with a view to the building up of faith and character.

ψαλμὸν psalmon “a psalm”

but drink deeply of God's Spirit. Speak to one another with psalms and hymns and spiritual songs. Sing and offer praise in your hearts to the Lord.

ψαλμοῖς psalmois “psalms”

Let the teaching concerning Christ remain as a rich treasure in your hearts. In all wisdom teach and admonish one another with psalms, hymns, and spiritual songs, and sing with grace in your hearts to God.

ψαλμοῖς, psalmois “in psalms,”