Examine me, O LORD, and prove me; try my reins and my heart.
Ver. 2. Examine me, O Lord, and prove me] It must needs be a good conscience that thus boldly offereth itself to God's trial; so Job 31:6 .
Try my reins and my heart] i.e. Mine affections and thoughts; for these are sibi mutuo causae. While I mused the fire kindled, Psalms 39:3. David was neither ambitious nor factious, as his adversaries represented him.