Psalm 140

In the first 8 verses of this psalm David makes three request of God in the face of his enemies. For deliverance, protection, and the blocking of their requests. David knew that the only sure defence against those that were oppressing him was through God's hand.  That is the same attitude that Jesus displayed and that Paul eventually adopted. When we stand only in our weakness then God can more easily display his strentgh in our lives. 
It took me less than 2 minutes to read this passage.
Stuart