Psalm 51:10 

New International Version (NIV)

¹⁰ Create in me a pure heart,

O God,
    and renew a steadfast spirit within me.

Psalm 32:1-5 

New International Version (NIV)

Psalm 32

Of David. A maskil.

¹ Blessed is the one
    whose transgressions are forgiven,
    whose sins are covered.
² Blessed is the one
    whose sin the Lord does not count against them
    and in whose spirit is no deceit.

³ When I kept silent,
    my bones wasted away
    through my groaning all day long.
⁴ For day and night
    your hand was heavy on me;
my strength was sapped
    as in the heat of summer.

⁵ Then I acknowledged my sin to you
    and did not cover up my iniquity.
I said, “I will confess
    my transgressions to the Lord.”
And you forgave
    the guilt of my sin.

Psalm 38:4,8

New International Version (NIV)

⁴ My guilt has overwhelmed me

⁸ I am feeble and utterly crushed;
    I groan in anguish of heart.

Jeremiah 31:31 

New International Version (NIV)

³¹ “The days are coming,” declares the Lord,
    “when I will make a new covenant
with the people of Israel
    and with the people of Judah

Jeremiah 31:33-34 New International Version (NIV)

³³ “This is the covenant I will make with the people of Israel
    after that time,” declares the Lord.
“I will put my law in their minds
    and write it on their hearts.
I will be their God,
    and they will be my people.
³⁴ No longer will they teach their neighbor,
    or say to one another, ‘Know the Lord,’
because they will all know me,
    from the least of them to the greatest,”
declares the Lord.
“For I will forgive their wickedness
    and will remember their sins no more.”