Have mercy on me, O God, according to Your unfailing love, according to Your great compassion. Blot out my transgressions. Wash away all my iniquity and cleanse me from my sin. Create in me a pure heart, O God, and renew a steadfast spirit within me. Do not cast me from Your presence or take Your Holy Spirit from me. Restore to me the joy of Your salvation. Purify me from sin.
Psalms 51:1-2, 10-12