The Seven Penitential Psalms:
Psalms 6, 31, 37, 50, 101, 129 and 142
Since the days of Pope Innocent III (1198-1216), these psalms have been suggested to be prayed during the Holy Season of Lent. Some would suggest the be prayed on each day in Lent or they can at least be prayed on Lenten Fridays (or one could pray one prayer on each of the 7 Fridays of Lent.).
For the leader; with stringed instruments, "upon the eighth." A psalm of David.
Do not reprove me in your anger, LORD, nor punish me in your wrath.
Have pity on me, LORD, for I am weak; heal me, LORD, for my bones are trembling.
In utter terror is my soul-- and you, LORD, how long...?
Turn, LORD, save my life; in your mercy rescue me.
For who among the dead remembers you? Who praises you in Sheol?
I am wearied with sighing; all night long tears drench my bed; my couch is soaked with weeping.
My eyes are dimmed with sorrow, worn out because of all my foes.
Away from me, all who do evil! The LORD has heard my weeping.
The LORD has heard my prayer; the LORD takes up my plea.
My foes will be terrified and disgraced; all will fall back in sudden shame.
Psalm 31For the leader. A psalm of David.
In you, LORD, I take refuge; let me never be put to shame. In your justice deliver me;
incline your ear to me; make haste to rescue me! Be my rock of refuge, a stronghold to save me.
You are my rock and my fortress; for your name's sake lead and guide me.
Free me from the net they have set for me, for you are my refuge.
Into your hands I commend my spirit; you will redeem me, LORD, faithful God.
You hate those who serve worthless idols, but I trust in the LORD.
I will rejoice and be glad in your love, once you have seen my misery, observed my distress.
You will not abandon me into enemy hands, but will set my feet in a free and open space.
Be gracious to me, LORD, for I am in distress; with grief my eyes are wasted, my soul and body spent.
My life is worn out by sorrow, my years by sighing. My strength fails in affliction; my bones are consumed.
To all my foes I am a thing of scorn, to my neighbors, a dreaded sight, a horror to my friends. When they see me in the street, they quickly shy away.
I am forgotten, out of mind like the dead; I am like a shattered dish.
I hear the whispers of the crowd; terrors are all around me. They conspire against me; they plot to take my life.
But I trust in you, LORD; I say, "You are my God."
My times are in your hands; rescue me from my enemies, from the hands of my pursuers.
Let your face shine on your servant; save me in your kindness.
Do not let me be put to shame, for I have called to you, LORD. Put the wicked to shame; reduce them to silence in Sheol.
Strike dumb their lying lips, proud lips that attack the just in contempt and scorn.
How great is your goodness, Lord, stored up for those who fear you. You display it for those who trust you, in the sight of all the people.
You hide them in the shelter of your presence, safe from scheming enemies. You keep them in your abode, safe from plotting tongues.
Blessed be the LORD, who has shown me wondrous love, and been for me a city most secure.
Once I said in my anguish, "I am shut out from your sight." Yet you heard my plea, when I cried out to you.
Love the LORD, all you faithful. The LORD protects the loyal, but repays the arrogant in full.
Be strong and take heart, all you who hope in the LORD.
Look for the rest. They make for great comfort.