Romans 5:20-21

But, besides the first offense, law was introduced, in order that offenses might abound: but where sin abounded, grace did much more abound:

Ephesians 1:7-8

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

James 5:11

Behold, we count those happy who endure. You have heard of the patience of Job, and have seen the final dealing of the Lord, that the Lord is very compassionate and merciful.

Treasury of Scripture Knowledge

Summary

The LORD is merciful and gracious, slow to anger, and plenteous in mercy.

Bible References

Merciful

Romans 5:20
But, besides the first offense, law was introduced, in order that offenses might abound: but where sin abounded, grace did much more abound:
Ephesians 1:7
in whom we have redemption through his blood, even the remission of sins, according to the riches of his grace,