Contradiction with Matthew 5:44
While Psalms 109:20 speaks of rendering evil, Matthew 5:44 instructs to love your enemies and bless those who curse you.
Matthew 5:44: But I say unto you, Love your enemies, bless them that curse you, do good to them that hate you, and pray for them which despitefully use you, and persecute you;
Contradiction with Romans 12:14
This verse contradicts Psalms 109:20 by advising to bless those who persecute you, not to curse.
Romans 12:14: Bless them which persecute you: bless, and curse not.
Contradiction with Luke 6:27-28
These verses ask to love your enemies and do good to them, in contrast to the consequences described in Psalms 109:20.
Luke 6:27-28: But I say unto you which hear, Love your enemies, do good to them which hate you,
Contradiction with Proverbs 25:21-22
Suggests feeding your enemy if he is hungry, which opposes the hostility expressed in Psalms 109:20.
Proverbs 25:21-22: If thine enemy be hungry, give him bread to eat; and if he be thirsty, give him water to drink:
Contradiction with Romans 12:20-21
Encourages overcoming evil with good, contrary to the theme of retribution in Psalms 109:20.
Romans 12:20-21: Therefore if thine enemy hunger, feed him; if he thirst, give him drink: for in so doing thou shalt heap coals of fire on his head.
Contradiction with 1 Peter 3:9
Advises not to return evil for evil, but rather bless others, conflicting with Psalms 109:20.
1 Peter 3:9: Not rendering evil for evil, or railing for railing: but contrariwise blessing; knowing that ye are thereunto called, that ye should inherit a blessing.
Contradiction with Proverbs 24:17
Warns against rejoicing when your enemy falls, which is implied in Psalms 109 with wishing harm on foes.
Proverbs 24:17: Rejoice not when thine enemy falleth, and let not thine heart be glad when he stumbleth:
Paradox #1
Psalms 109:20 asks for negative consequences to fall upon those who speak ill against the psalmist. The contradiction here could be that while many teachings in the Bible, such as the call to love your enemies and forgive others (as seen in the New Testament), promote forgiveness and compassion, this verse seems to focus on wishing harm or retribution. This could be seen as inconsistent with the overall message of love and forgiveness found in other parts of the Bible.