1 For the Leader. A Psalm of David. O LORD, Thou hast searched me, and known me.2 Thou knowest my downsitting and mine uprising, Thou understandest my thought afar off.3 Thou measurest my going about and my lying down, and art acquainted with all my ways.4 For there is not a word in my tongue, but, lo, O LORD, Thou knowest it altogether.