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Matthew 5:21-24

New International Version 1984 (NIV1984)

Murder
    21 “You have heard that it was said to the people long ago, ‘Do not murder, and anyone who murders will be subject to judgment.’ 22 But I tell you that anyone who is angry with his brother will be subject to judgment. Again, anyone who says to his brother, ‘Raca,’ is answerable to the Sanhedrin. But anyone who says, ‘You fool!’ will be in danger of the fire of hell.

   23 “Therefore, if you are offering your gift at the altar and there remember that your brother has something against you, 24 leave your gift there in front of the altar. First go and be reconciled to your brother; then come and offer your gift.

From BibleGateway.com: http://www.biblegateway.com/passage/?search=Matthew 5:21-24&version=NIV1984