Psalm 139 is the 139th psalm from the Book of Psalms. It is ascribed to David. It is known for its affirmation of God's omnipresence:
Psalm 139 To the choirmaster. A Psalm of David O Lord, thou hast searched me and known me!/ Thou knowest when I sit down and when I rise up;/ thou discernest my thoughts from afar. / Thou searchest out my path and my lying down,/ and art acquainted with all my ways./ Even before a word is on my tongue,/ lo, O Lord, thou knowest it altogether./ Thou dost beset me behind and before,/ and layest thy hand upon me./ Such knowledge is too wonderful for me;/ it is high, I cannot attain it./ Whither shall I go from thy Spirit?/ Or whither shall I flee from thy presence?/ If I ascend to heaven, thou art there!/ If I make my bed in Sheol, thou art there!/ If I take the wings of the morning/ and dwell in the uttermost parts of the sea,/ even there thy hand shall lead me,/ and thy right hand shall hold me. / If I say, “Let only darkness cover me,/ and the light about me be night,”/ even the darkness is not dark to thee,/ the night is bright as the day;/ for darkness is as light with thee./ For thou didst form my inward parts,/ thou didst knit me together in my mother’s womb./ I praise thee, for thou art fearful and wonderful./ Wonderful are thy works!/ Thou knowest me right well;/ my frame was not hidden from thee,/ when I was being made in secret,/ intricately wrought in the depths of the earth./ Thy eyes beheld my unformed substance;/ in thy book were written, every one of them,/ the days that were formed for me,/ when as yet there was none of them./ How precious to me are thy thoughts, O God!/ How vast was the sum of them!/ If I would count them, they are more than the sand./ When I awake, I am still with thee./ O that thou wouldst slay the wicked, O God, / and that men of blood would depart from me,/ men who maliciously defy thee,/ who lift themselves up against thee for evil!/ Do I not hate them that hate thee, O Lord?/ And do I not loathe them that rise up against thee?/ I hate them with perfect hatred;/ I count them my enemies./ Search me, O God, and know my heart!/ Try me and know my thoughts!/ And see if there be any wicked way in me,/ and lead me in the way everlasting!