Romans 5:20-21

But the law came in between, that the offence might abound: yet where sin abounded, grace did much more abound:

Ephesians 1:7-8

by which he hath freely accepted us through the beloved, By whom we have redemption through his blood, the forgiveness of our sins,

James 5:11

Behold, we count them happy that have endured. Ye have heard of the patience of Job, and have seen the end of the Lord: for the Lord is very pitiful and of tender mercy.

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 the law came in between, that the offence might abound: yet where sin abounded, grace did much more abound:
Ephesians 1:7
by which he hath freely accepted us through the beloved, By whom we have redemption through his blood, the forgiveness of our sins,