John Gill

Turn away my reproach which I fear,.... Either for the sake of religion, which was disagreeable to him; and he might be afraid it would be too heavy for him to bear, and be a temptation to him to forsake the good ways of God: or rather by reason of sin, which brings a reproach on good men; and causes the enemy to speak reproachfully, and is therefore dreaded by them who desire to be kept from sin, for that reason as well as others; see Psa 39:8. Jarchi and Kimchi think that David has some reference to his sins, in the case of Uriah and Bathsheba; lest they should be a perpetual reproach on his name and family, which he greatly feared; for thy judgments are good; the laws of God, and punishment of sin according to them; the Scriptures, and the doctrines contained in them; the ways of God, and true religion; which are evil spoken of, through the sins of the professors of them.