The Lord will not leave him in his hand. God, as a general rule, does not allow the wicked man to work his will upon the righteous. He interposes one cheek or another, and saves the righteous man from destruction.
Nor condemn him when he is judged; i.e. nor will he allow him to be condemned when the wicked man brings an accusation against him, and seeks to have him sentenced to death by an ignorant or unjust judge.
These promises are not universal nor absolute, since many good men have been assassinated by their enemies, as Abel by Cain; and many have been wrongfully condemned to death and executed, as Naboth at the instigation of Jezebel.