Psalm 17:3

Though you probe my heart, though you examine me at night and test me, you will find that I have planned no evil; my mouth has not transgressed.

Though you probe my heart 
Psalm 139:1  You have searched me, LORD, and you know me.
Jeremiah 12:3  Yet you know me, LORD; you see me and test my thoughts about you. Drag them (the wicked, the faithless) off like sheep to be butchered! Set them apart for the day of slaughter!

though you examine me at night and test me 
Job 7:17-18  "What is mankind that you make so much of them, that you give them so much attention, that you examine them every morning and test them every moment?"

you will find that I have planned no evil 
Job 23:10  "But he knows the way I take; when he has tested me, I will come forth as gold."
Jeremiah 50:20  "In those days, at that time," declares the LORD, "search will be made for Israel's guilt, but there will be none, and for the sins of Judah, but none will be found, for I will forgive the remnant I spare."

my mouth has not transgressed 
Psalm 39:1  I said, "I will watch my ways and keep my tongue from sin; I will put a muzzle on my mouth while in the presence of the wicked."

(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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