Job 16:20 states his friends actually scorn him — complementing the hypothetical scorn Job could show in the main verse.

In Job 6:14, Job says a friend should show kindness — here he implies he would show more empathy than his friends.

In Job 11:2, Zophar criticizes Job's many words — the same complaint Job says he could level at them. Both deal with the power of speech in debate.

In Job 35:16, Elihu accuses Job of multiplying words without knowledge — echoing Job's claim that he too could heap up words against his friends.

Job 12:5 describes the comfortable despising the unfortunate — the same attitude Job says he could adopt by shaking his head.

Job 26:2 is sarcastic mockery of Bildad's help — similar biting tone to Job's hypothetical 'heaping up words' in the main verse.

Psalm 109:25 describes the psalmist becoming a target of head-shaking mockery — Job threatens to do the same to his friends.

Romans 12:15 calls for empathy — Job 16:4 similarly says he would feel and speak differently if in their place.

In Matthew 27:39, passersby wag their heads in mockery — the same gesture Job says he could use against his friends.

Matthew 7:12 is the Golden Rule — Job 16:4 expresses the same empathy: treat others as you'd want if in their place.

Lamentations 2:15 shows enemies wagging their head in mockery at Jerusalem — Job says he could do the same to his comforters.

In Jeremiah 18:16, passersby wag their head in derision at desolate land — Job says he could wag his head at his friends.

In 2 Kings 19:21, Zion shakes her head in scorn at Sennacherib — the same gesture Job offers to use against his friends.

In Psalm 44:14, being a shaking of the head means being an object of scorn — Job says he could do that to them.

Psalm 22:7 describes mockers shaking their head — the exact gesture Job threatens to make against his comforters.

Ecclesiastes 10:14 says a fool multiplies words — Job's statement that he could heap up words aligns with this wisdom.

Proverbs 10:19 warns that many words lead to sin — Job's ironic offer to heap up words reflects the same danger.

Psalm 123:4 speaks of contempt from the at‑ease — the same kind of scorn Job could express by shaking his head.

1 Corinthians 12:26 says the body suffers together — Job 16:4 implies his friends would speak differently if they shared his suffering.