So speak ye,
and so do,
as they that shall be judged
by the law of liberty.

For he shall have judgment without mercy,
that hath shewed no mercy;
and mercy rejoiceth against judgment.

James 2:9-17

Here you have that second verse in the New King James Version:

For judgment is without mercy
to the one who has shown no mercy.
Mercy triumphs over judgment.

Surely you could add something...