Psalm 109:7
“When he shall be judged, let him be condemned: and let his prayer become sin.”
KJV
Read in Psalm 109Meaning
This is extreme courtroom imprecation, not a doctrine that an opponent's every prayer is worthless or that humans may declare a person's spiritual fate.
Imprecatory judicial appeal
The speaker voices severe curses and asks God to answer hostile accusation with judgment.
Read carefully
The verse is not a license for spiritual domination or excommunication by personal anger.
Reflection
Ask for truth and justice rather than assuming total knowledge of the person.