Matt.5.21  "You have heard that it was said to the men of old, `You shall not kill; and whoever kills shall be liable to judgment.'
Matt.5.22  But I say to you that every one who is angry with his brother shall be liable to judgment; whoever insults his brother shall be liable to the council, and whoever says, `You fool!' shall be liable to the hell of fire.

Hyper-concordance v1.1, by Sean Boisen. Scripture verses taken from the Revised Standard Version, copyright 1952, 1971.