From Association of Independent Readers and Rootworkers
Hoodoo psychic readers, spirit workers and root doctors who recite Psalms on behalf of clients may work with Psalm 13 during altar work and prayers for safety from unnatural death as well as protection from injury or punishments. Psalm 13 can be utilized to cure dangerous or painful eye diseases when employed with applications of appropriate herbs to the eyes,
To the chief Musician, A Psalm of David.
 How long wilt thou forget me, O LORD? for ever? how long wilt thou hide thy face from me?
 How long shall I take counsel in my soul, having sorrow in my heart daily? how long shall mine enemy be exalted over me?
 Consider and hear me, O LORD my God: lighten mine eyes, lest I sleep the sleep of death;
 Lest mine enemy say, I have prevailed against him; and those that trouble me rejoice when I am moved.
 But I have trusted in thy mercy; my heart shall rejoice in thy salvation.
 I will sing unto the LORD, because he hath dealt bountifully with me.