Psalm 26:1

Vindicate me, LORD, for I have led a blameless life; I have trusted in the LORD and have not faltered. 

Vindicate me, LORD 
1 Samuel 24:14-15  (David confronting King Saul) "Against whom has the king of Israel come out? Who are you pursuing? A dead dog? A flea? May the LORD be our judge and decide between us. May he consider my cause and uphold it; may he vindicate me by delivering me from your hand."

for I have led a blameless life 
Psalm 15:2  The one whose walk is blameless, who does what is righteous, who speaks the truth from their heart; ...
Proverbs 20:7  The righteous lead blameless lives; blessed are their children after them.

I have trusted in the LORD 
Psalm 22:4  In you our ancestors put their trust; they trusted and you delivered them.
Psalm 40:4  Blessed is the one who trusts in the LORD, who does not look to the proud, to those who turn aside to false gods.
Isaiah 12:2  Surely God is my salvation; I will trust and not be afraid. The LORD, the LORD himself is my strength and my defense; he has become my salvation.
Isaiah 25:9  In that day they will say, "Surely this is our God; we trusted in him and he saved us. This is the LORD, we trusted in him; let us rejoice and be glad in his salvation."
Jeremiah 17:7  "But blessed is the one who trusts in the LORD, whose confidence is in him."
Daniel 3:28  Then Nebuchadnezzar said, "Praise be to the God of Shadrach, Meshach and Abednego, who has sent his angel and rescued his servants! They trusted in him and defied the king's command and were willing to give up their lives rather than serve or worship any god except their own God.

and have not faltered 
2 Kings 20:2-3  Hezekiah turned his face to the wall and prayed to the LORD. "Remember, LORD, how I have walked before you faithfully and with wholehearted devotion and have done what is good in your eyes." And Hezekiah wept bitterly.
Hebrews 10:23  Let us hold unswervingly to the hope we profess, for he who promised is faithful.

(parentheses are mine)

Scriptures taken from the Holy Bible, New International Version® NIV®, Copyright© 1973, 1978, 1984, 2011 by Biblica, Inc.® Used by permission. All rights reserved worldwide. 
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