Psalm 50:16-20 condemns those who recite God's laws yet hate instruction and use speech for evil — matching James's critique of hypocritical blessing and cursing.

Jeremiah 7:4-10 denounces those who trust in temple words while living wickedly — a parallel hypocrisy of mouth and deeds.

Micah 3:11 shows leaders who claim God is with them yet take bribes — a similar disconnect between confession and action.

Romans 12:14 commands blessing, not cursing, even toward persecutors — reinforcing James's point that cursing should not come from believers.

1 Peter 3:9 also instructs not to repay evil with evil but to bless — echoing the same prohibition against cursing from the mouth.

Job 31:30 shows Job never cursed his enemy — a positive example of controlling the mouth, directly supporting the idea that cursing should not come from a believer.

Luke 6:28 commands blessing those who curse you — a direct instruction to replace cursing with blessing, showing the proper use of the mouth.

Romans 3:14 describes the wicked whose mouths are full of cursing — a portrait of sinful speech that contrasts with the believer's call to bless.