You spoke by the Holy Spirit through the mouth of your servant, our father David: "Why do the nations rage and the peoples plot in vain?" (NIV)
Who by the mouth of our forefather David, Your servant and child, said through the Holy Spirit, Why did the heathen (Gentiles) become wanton and insolent and rage, and the people imagine and study and plan vain (fruitless) things [that will not succeed]? (AMP)
Who by the mouth of thy servant David hast said, Why did the heathen rage, and the people imagine vain things? (KJV)