The Psalter of the Prophet David (in Russian translation by P. Yungerov)

And these troparia, tone 1:

In iniquity, having conceived, I, the prodigal, do not dare to gaze upon the heights of Heaven, but, daring to love Thy humanity, I call: O God, cleanse me, a sinner, and save me. If the righteous are scarcely saved, where shall I appear, sinner? I did not bear the hardships and heat of the day, but with the mercenaries of the tenth hour count me, O God, and save me. Glory: Open the embrace of the Father, O thou who hast fornicated my life, behold Thy mercies, O Saviour, that my heart which is now impoverished, may not despise me. For Thee, O Lord, I call with tenderness: those who have sinned in Heaven and before Thee. And now: The hope of Christians, O Most Holy Virgin, Whom Thou didst give birth to God more than the mind and the word, pray unceasingly with the heavenly powers to grant the forgiveness of sins, to all of us and the correction of our lives, to those who ever honor Thee by faith and love.

Lord, have mercy (40) and the prayer:

For Thou art God, Good and Lover of mankind, and unto Thee do we send up glory, to the Father, and to the Son, and to the Holy Spirit, now and ever, and unto the ages of ages, Amen.

Second kathisma

9. In the end. About the secrets of the son. Psalm of David.

I will confess to Thee, O Lord, with all my heart, I will tell all Thy miracles. I will rejoice and rejoice in Thee, I will sing praises to Thy name, O Most High, When my enemy turns back: they shall faint and perish at Thy presence. For Thou hast decided my judgment and my lawsuit: He who judges righteousness is seated on the throne. Thou hast punished the nations, and the wicked have perished. Thou hast blotted out his name for ever and ever. The enemy's weapons are utterly exhausted, and Thou hast destroyed the cities: the memory of him perished with a noise. But the Lord abides eternally, He has prepared His throne for judgment. And He will judge the world in righteousness, He will judge people in righteousness. And the Lord was a refuge for the poor, a helper at the right time, in sorrows. And let them that know thy name trust in thee, for thou hast not forsaken them that seek thee, O Lord. Sing unto the Lord who dwelleth in Zion, and proclaim His works among the nations: For when He sought for their blood, He remembered, and did not forget the cry of the poor. Have mercy on me, O Lord! Behold my humiliation from my enemies, Thou who liftest me up from the gates of death, that I may declare all thy praises in the gates of the daughter of Zion. Let us rejoice in Thy salvation. The nations are steeped in the destruction which they have made: in the snare which they hid their foot is entangled. The Lord is known when he executes judgments: the sinner is stuck in the works of his hands. Let sinners go to hell, all nations that forget God. For the poor will not be forgotten forever, the patience of the poor will not perish to the end. Arise, O Lord! Let not man prevail, let the nations be judged before Thee. Set a lawgiver, O Lord, over them, that the nations may know that they are men. Why hast Thou, O Lord, stood afar off? Do you despise prosperity (and) sorrow? When the wicked are proud, the beggar is irritated: they get bogged down in the plans that they deliberate. For the sinner is praised for the lusts of his soul, and the offender is approved. The sinner provoked the Lord, because of his great boldness (saying): "He will not seek." There is no God before him. His ways are defiled at all times, Thy judgments are removed from his presence, he rules over all his enemies. For he said in his heart, I will not be shaken, for from generation to generation I will be without evil. His lips are full of oaths, bitterness, and flattery, and on his tongue are torment and malice. He sits in ambush, in hiding places, with the rich, to kill the innocent, his eyes peeping at the beggar. He lies in wait in a secret place, like a lion in his den, he lies in wait to seize the beggar, to seize the beggar, having attracted him with his net. He will humble him, bend down and fall, when he possesses the poor. For he said in his heart, "God has forgotten, he has turned away his face, that he may never see." Arise, O Lord my God! Let Thy hand be lifted up, and forget not Thy poor to the end. Why did the wicked anger God? Because he said in his heart, "He will not seek." (But) You see, for You look at suffering and anger. Let him be delivered into Thy hands: To Thee is given the beggar, Thou shalt be a helper to the fatherless. Break the arm of the sinner and the wicked, so that his sin may be sought and not found. The Lord is King for ever and ever. Disappear, you heathen, from His land! Thou hast heard the desire of the poor, O Lord: Thy ear has hearkened to the devotion of their hearts. Justify the fatherless and the humble, so that man may no longer continue to exalt himself on earth.

10. In the end. Psalm of David.

In the Lord I trust, as you say to my soul, 'Fly away to the mountains like a bird?' For behold, sinners have drawn a bow, and have prepared arrows in their quivers, that in darkness they may shoot at the upright in heart, and what thou hast done, they have destroyed, but what hast the righteous done? The Lord is in His holy temple: the Lord is His throne in heaven, His eyes look upon the poor, His apples test the sons of men. The Lord tests the righteous and the wicked, but he who loves unrighteousness hates his own soul. He will bring down snares upon sinners: fire, and brimstone, and a stormy spirit, their portion (of) the cup (of sorrows). For the Lord is righteous, and has loved righteousness, and sees righteousness in His face.

Glory:

11. In the end. About the octom (day). Psalm of David.

Save me, O Lord, for the saint is no more, for the truth is diminished among the sons of men. Every man spoke vain things to his neighbor: flattering lips (spoke) from the heart, and from the heart they spoke evil things. The Lord will destroy all the flattering lips, the haughty tongue, Those who say, "Let us magnify our tongues, our lips are with us, who is the Lord to us?" For the suffering of the poor, and the groaning of the poor, I will now arise, – says the Lord, – I will be salvation, I will be revealed in it. You, O Lord, will preserve us and keep us from this generation and forever. The wicked walk around. According to Thy height, Thou hast multiplied the care for the children of men.

12. In the end. Psalm of David.