Romans 5:20-21

Moreover the law came in in addition, that the trespass might abound; but where sin abounded, grace abounded much more;

Ephesians 1:7-8

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

James 5:11

Behold, we count those happy who have endured. Ye have heard of the patience of Job; behold also the end of the Lord, that he 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
Moreover the law came in in addition, that the trespass might abound; but where sin abounded, grace abounded much more;
Ephesians 1:7
in whom we have the redemption through his blood, the forgiveness of our trespasses, according to the riches of his grace,