In Job 15:2, Eliphaz accuses Job of windy knowledge — contrasting Elihu's claim of sincere, upright speech here.

In Job 27:4, Job similarly vows to speak no falsehood — a parallel commitment to integrity.

In Job 36:3, Elihu continues his discourse, claiming to get knowledge from afar and ascribe righteousness — parallel to his claim of sincerity.

In Job 36:4, Elihu insists his words are not false and he is perfect in knowledge — directly reinforcing his sincerity claim.

In Job 38:2, God rebukes those who darken counsel without knowledge — contrasting Elihu's self-assured claim of upright speech.

Psalm 49:3 directly parallels Elihu's claim: 'My mouth shall speak of wisdom; the meditation of my heart shall be of understanding.'

In Proverbs 8:7, Wisdom declares her mouth utters truth — echoing Elihu's claim of sincere speech.

In Proverbs 8:8, Wisdom says her words are righteous and straight — parallel to Elihu's upright heart and sincere lips.

Psalm 45:1 also speaks of heart and lips uttering good words, similar to Elihu's claim of upright speech from the heart.

Proverbs 15:2 contrasts wise tongues that commend knowledge with fools' folly — parallel to Elihu's claim of wise speech.

Proverbs 15:7 says wise lips spread knowledge — parallel to Elihu's claim that his lips speak sincerely.

Proverbs 20:15 values lips of knowledge as a precious jewel — parallel to Elihu's claim of speaking knowledge.

2 Corinthians 6:11 uses similar imagery of open mouth and enlarged heart, expressing sincerity as Elihu does.

In 1 Thessalonians 2:3, Paul denies deceit in his preaching — parallel to Elihu's claim of sincere speech.

In 1 Thessalonians 2:4, Paul speaks to please God who tests hearts — parallel to Elihu's claim of upright heart.

Psalm 37:30 says the righteous utter wisdom and justice — a general parallel to Elihu's claim of speaking uprightly.