Matthew 5:19-22

19Whoever therefore shall break one of these least commandments, and shall teach men so, he shall be called the least in the kingdom of heaven: but whoever shall do and teach them, the same shall be called great in the kingdom of heaven. 20For I say to you, That except your righteousness shall exceed the righteousness of the scribes and Pharisees, ye shall in no way enter into the kingdom of heaven.

21Ye have heard that it was said to them of old time, Thou shalt not kill; and whoever shall kill shall be in danger of the judgment:1 22But I say to you, That whoever is angry with his brother without a cause shall be in danger of the judgment: and whoever shall say to his brother, Raca, shall be in danger of the council: but whoever shall say, Thou fool, shall be in danger of hell fire.2