What does the Bible say about the tongue of the wicked?

Psalm 10:7-11 gives a vivid portrait of the wicked man's tongue, indicating that it is filled with curses and deceit. This scripture outlines how the wicked man refuses to seek God and instead uses his speech to oppress the vulnerable. The inherent connection between a person's heart and their speech is essential; Jesus taught that out of the abundance of the heart, the mouth speaks (Matthew 12:34). Hence, the language of the wicked is not merely a matter of words but is a clear indication of their corrupted nature and their lack of reverence for God.