Acts 3:19

Repent therefore and be converted, that your sins may be blotted out: that seasons of refreshing may come upon you from the presence of the Lord;

Colossians 2:14

and cancelled the obligation we were under by ritual decrees, which was grievous to us, and hath taken it quite away, even nailing it to his cross.

Romans 5:20-21

Now the law made some entrance, that the offence might appear to abound; but where sin abounded, grace hath superabounded; that as sin had reigned in death,

Ephesians 1:6-8

to the praise of his glorious grace, whereby He hath made us acceptable in the Beloved:

Ephesians 2:4-7

But God being rich in mercy, through his great love wherewith He loved us,

Treasury of Scripture Knowledge

Summary

{To the chief Musician, A Psalm of David, when Nathan the prophet came unto him, after he had gone in to Bathsheba.} Have mercy upon me, O God, according to thy lovingkindness: according unto the multitude of thy tender mercies blot out my transgressions.

Bible References

O god

Romans 5:20
Now the law made some entrance, that the offence might appear to abound; but where sin abounded, grace hath superabounded; that as sin had reigned in death,
Ephesians 1:6
to the praise of his glorious grace, whereby He hath made us acceptable in the Beloved:
Ephesians 2:4
But God being rich in mercy, through his great love wherewith He loved us,