John 1:17

For the Law was given by Moses, but grace and truth came through Jesus Christ.

Romans 5:20-21

Now law was brought in so that transgression might abound; but where sin abounded, grace super-abounded;

Romans 15:8-9

For I say that Christ has been made a minister of the Circumcision the people of Israel, in vindication of God's truth, so that he may confirm the promises given to our forefathers;

Ephesians 1:7

It is in him we have deliverance, the forgiveness of our trespasses, through his blood;

Ephesians 2:4-7

But God, who is rich in mercy, because of the great love with which 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
Now law was brought in so that transgression might abound; but where sin abounded, grace super-abounded;
Ephesians 1:7
It is in him we have deliverance, the forgiveness of our trespasses, through his blood;
Ephesians 2:4
But God, who is rich in mercy, because of the great love with which he loved us,