Contradiction with Ecclesiastes 8:14
This verse describes how sometimes the righteous suffer and the wicked prosper, contradicting the promise in Psalms 37:6 of righteousness being evident as light.
Ecclesiastes 8:14: There is a vanity which is done upon the earth; that there be just [men], unto whom it happeneth according to the work of the wicked; again, there be wicked [men], to whom it happeneth according to the work of the righteous: I said that this also [is] vanity.
Contradiction with Job 21:7-9
These verses describe the prosperity of the wicked, contradictory to the declaration in Psalms 37:6 that righteousness and justice will shine clearly.
Job 21:7-9: Wherefore do the wicked live, become old, yea, are mighty in power?
Contradiction with Jeremiah 12:1
Jeremiah questions why the wicked prosper, seemingly at odds with the assurance in Psalms 37:6 of the righteous being visibly upheld.
Jeremiah 12:1: Righteous [art] thou, O LORD, when I plead with thee: yet let me talk with thee of [thy] judgments: Wherefore doth the way of the wicked prosper? [wherefore] are all they happy that deal very treacherously? [talk...: or, reason the case with thee]
Contradiction with Habakkuk 1:13
Habakkuk expresses confusion over God's tolerance of treacherous men, contradicting the implication in Psalms 37:6 that justice for the righteous will be clear and apparent.
Habakkuk 1:13: [Thou art] of purer eyes than to behold evil, and canst not look on iniquity: wherefore lookest thou upon them that deal treacherously, [and] holdest thy tongue when the wicked devoureth [the man that is] more righteous than he? [iniquity: or, grievance]
Contradiction with Psalm 73:3-5
These verses narrate the prosperity of the wicked, opposing the message in Psalms 37:6 about the visibility of the righteousness of the just.
Psalm 73:3-5: For I was envious at the foolish, [when] I saw the prosperity of the wicked.