Responsorial Psalm (Ps 51)
R.  A heart contrite and humbled, O God, you will not spurn.
 Have mercy on me, O God, in your goodness; in the greatness of your compassion wipe out my offense.
Thoroughly wash me from my guilt and of my sin cleanse me.
R.  A heart contrite and humbled, O God, you will not spurn.
https://bible.usccb.org/bible/readings/030922.cfm
Psalm 51 is one of the 7 penitential psalms: 6, 32 (31), 38 (37), 51 (50), 102 (101), 130 (129), and 143 (142). Psalm 51 is prayed every Friday at Morning Prayer. We ask not only for a clean heart, but also for a renewed, contrite spirit.