The words of the wicked are to lie in wait for blood — i.e., are calculated for this end.
The mouth of the upright shall deliver them — i.e., those for whom the wicked lie in wait.
Related Commentaries of Proverbs 12:6
Proverbs 12:6
6 The words of the wicked are to lie in wait for blood: but the mouth of the upright shall deliver them.