The book of Proverbs tells us that anyone who spreads slander is a fool and that when there are many words, transgression is unavoidable. Matthew 7 tells us not to judge, lest we be judged.
We learn from studying Genesis that Dan was a backbiter; he judged his own people, one of the tribes of Israel, and his words would cause corruption. Stephen D. Lewis implores us to control our tongues and to refrain from speaking of the faults of others. Our mouths should bring forth praises to God.
Further Study on this Topic: Preparation for the Coming of Christ