They are worthless, the objects of mockery; when their judgment comes, they will perish.
NIV
They are worthless (emptiness, falsity, futility), a work of delusion and worthy of derision; in the time of their inspection and punishment they shall [helplessly] perish.
AMP
They are vanity, the work of errors: in the time of their visitation they shall perish.
KJV
May my accusers perish in shame; may those who want to harm me be covered with scorn and disgrace.
NIV
Let them be put to shame and consumed who are adversaries to my life; let them be covered with reproach, scorn, and dishonor who seek and require my hurt.
AMP
Let them be confounded and consumed that are adversaries to my soul; let them be covered with reproach and dishonour that seek my hurt.
KJV