Matthew 5:22
22 But what I now say to you is this. Anybody who is angry with his brother will have to stand in front of a judge. If someone calls his brother by a bad name, he will have to stand in front of the Jewish leaders. They will judge him. But if someone says to his brother, “You are a useless fool,” that person deserves punishment in the fires of hell.
5:22‘Brother’ probably means any friend or other person that you know.