This week is so called because on Sunday of this week the parable of the publican and the Pharisee is read from the Gospel (Luke 18:10-14).
(Luke 18:10-14, according to Russian translation)
Two people entered the church to pray: one was a Pharisee, and the other was a tax collector. The Pharisee stood and prayed to himself like this: God! I thank You that I am not like other people, robbers, offenders, adulterers, or like this publican: I fast twice a week, I give a tenth of everything I acquire. - The publican, standing in the distance, did not even dare to raise his eyes to heaven: but, striking himself on the chest, he said: God! be merciful to me, a sinner! “I tell you that this one (i.e., the publican) went to his house justified more than that one: for everyone who exalts himself will be humbled, and he who humbles himself will be exalted.”
Starting from this week until Sunday of the fifth week of Lent, after the song: “Having seen the Resurrection of Christ,” repentant troparia are sung.
Open the doors of repentance for me, O Life-Giver, for my spirit will awaken to Your holy church, the church of my body is completely defiled: but, as you are generous, cleanse me with Your gracious mercy.
Instruct me in the path of salvation, O Mother of God, for I have scorched my soul with sins and spent my entire life in laziness: but through Your prayers, deliver me from all uncleanness.
Thinking of the many evil things I have done, O wretched one, I tremble at the terrible day of judgment: but trusting in the mercy of Thy compassion, like David I cry to Thee: have mercy on me, O God, according to Thy great mercy.
Life-giver! Open to me the doors of repentance, for my soul has been yearning for Your holy church since early morning, since its physical church is completely desecrated; but You, being generous, cleanse it according to Your immeasurable mercy.
Mother of God! guide me on the path of salvation, for I have defiled my soul with shameful sins and spent my entire life in laziness; but You, through Your prayers, deliver me from all uncleanness.
I, the unfortunate one, thinking about the many iniquities committed, tremble at the terrible day of judgment; but, hoping for Your immeasurable mercy, like David, I appeal to You: have mercy on me, O God, according to Your great mercy.