Psalms 51(50):3-4.12-13.14-15.

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.

A clean heart create for me, O God,
and a steadfast spirit renew within me.
Cast me not out from your presence,
and your Holy Spirit take not from me.

Give me back the joy of your salvation,
and a willing spirit sustain in me.
I will teach transgressors your ways,
and sinners shall return to you.