Mathew 5
22 “But I say to you that whoever is angry with his brother without a cause shall be in danger of the judgment. And whoever says to his brother, ‘Raca!’ [empty head] shall be in danger of the council. But whoever says, ‘You fool!’ shall be in danger of hell fire.
Nelson, Thomas (2009-02-18). Holy Bible, New King James Version (NKJV) (p. 939). Thomas Nelson. Kindle Edition.
Oh God, you even needed to provide a detailed cite that it came from the NKJV. Guess you’re not used to quoting scripture, eh?