1 To the chief musician, by David, a psalm. O Lord! thou hast searched me through, and thou knowest me.2 Thou indeed knowest my sitting down and my rising up, thou understandest my thinking while yet afar off.3 My walking and my lying down hast thou limited, and with all my ways art thou acquainted.4 For, while there is not a word on my tongue, lo, thou, O Lord, knowest it entirely.