John 1:17

For the law was given by Moses, but the grace and the reality came by Jesus Christ.

Romans 5:20-21

But the law was introduced, that the offence might be more abundant. But where sin had abounded, there hath grace abounded more exceedingly:

Romans 15:8-9

Now I say that Jesus Christ was the minister of circumcision for the truth of God, to confirm the promises made unto the fathers:

Ephesians 1:7

in whom we have redemption through his blood, even the forgiveness of sins, according to the riches of his grace;

Ephesians 2:4-7

But God, being rich in mercy, through the great love with which he hath 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
But the law was introduced, that the offence might be more abundant. But where sin had abounded, there hath grace abounded more exceedingly:
Ephesians 1:7
in whom we have redemption through his blood, even the forgiveness of sins, according to the riches of his grace;
Ephesians 2:4
But God, being rich in mercy, through the great love with which he hath loved us,