John 1:17

because the law was given through Moses; grace and truth came through Jesus Christ.

Romans 5:20-21

And the law entered, that the trespass might abound; but where sin abounded, grace did super-abound;

Romans 15:8-9

For I say that Christ hath become a minister of the circumcision, in behalf of God's truth, that He might confirm the promises made to the fathers;

Ephesians 1:7

in Whom we have our redemption through His blood, the forgiveness of our trespasses, according to the riches of His grace,

Ephesians 2:4-7

but God, being rich in mercy, on account of His great love wherewith He loved us,

Treasury of Scripture Knowledge

Summary

But thou, O Lord, art a God full of compassion, and gracious, longsuffering, and plenteous in mercy and truth.

Bible References

But thou

Romans 5:20
And the law entered, that the trespass might abound; but where sin abounded, grace did super-abound;
Ephesians 1:7
in Whom we have our redemption through His blood, the forgiveness of our trespasses, according to the riches of His grace,
Ephesians 2:4
but God, being rich in mercy, on account of His great love wherewith He loved us,