Psalm 5:9 says their tongues tell lies and their mouth is full of deceit, reinforcing the indictment of evil speech here.

Psalm 64:3-5 portrays tongues as weapons and bitter arrows, reinforcing the theme of malicious speech.

Psalm 55:21 describes smooth but deadly speech, directly illustrating deceitful words with hidden harm.

Psalm 52:3-4 condemns loving evil and falsehood, directly mirroring the accusation of using the mouth for evil and deceit.

Psalm 36:3 describes words that are wicked and deceitful, directly paralleling the evil and deceitful tongue.

Psalm 12:3 condemns flattering lips and boastful tongues, echoing the same judgment on deceitful speech.

Psalm 12:2 condemns lying and flattery with deceitful hearts, paralleling the charge of harnessing the tongue to deceit.

Psalm 10:7 describes a mouth full of lies and evil under the tongue, echoing the accusation of using the mouth for evil.

Psalm 52:2 describes a tongue that 'plots destruction' like a sharp razor — a vivid parallel to the evil and deceitful mouth here.

Isaiah 59:3 directly mentions lying lips and a wicked tongue, matching the condemnation of deceitful speech.

Isaiah 59:4 condemns speaking lies and false testimony, aligning with the deceitful tongue in Psalm 50:19.

Jeremiah 9:5 describes people teaching their tongues to lie, exactly matching the charge of harnessing the tongue to deceit.

Romans 3:13 quotes OT about deceitful tongues, reinforcing the universal sinfulness of speech.

Romans 3:14 echoes the same indictment: 'Their mouths are full of cursing and bitterness' — a parallel condemnation of evil speech.

James 3:5-9 expands on the tongue's power for evil — 'full of deadly poison' — directly paralleling the deceitful tongue here.

Job 15:5 accuses Job: 'Your sin prompts your mouth; you adopt the tongue of the crafty' — directly mirroring the deceitful tongue theme.

Hosea 4:2 lists lying among other sins, connecting deceitful speech to broader covenant unfaithfulness.

Revelation 21:8 lists liars among those condemned to the lake of fire — showing the ultimate judgment for the deceitful speech described here.