A prayer of a follower of Christ and those who come to Christ Jesus for salvation:

(NIV) Psalm 51:1-2

“HAVE MERCY on me, O God, according to your unfailing love; according to your great compassion blot out all my transgressions.

2Wash away all my iniquity and cleanse me from my sin.”

(NIV) Psalm 51:10-12

“Create in me a pure heart, O God, and renew a steadfast spirit within me.

11Do not cast me from your presence or take your Holy Spirit from me.

12Restore to me the joy of your salvation and grant me a willing spirit, to sustain me.”