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 and grant me a willing spirit, to sustain me.
Then I will teach transgressors your ways, and sinners will turn back to you.
Save me from bloodguilt, O God, the God who saves me, and my tongue will sing of your righteousness.
O Lord, open my lips, and my mouth will declare your praise. (Psalm 51:10-15)