The food that you put into your mouth doesn't make you unclean and unfit to worship God. The bad words that come out of your mouth are what make you unclean."
Although Melchizedek wasn't a descendant of Levi, Abraham gave him a tenth of what he had. Then Melchizedek blessed Abraham, who had been given God's promise.
The tongue is like a spark. It is an evil power that dirties the rest of the body and sets a person's entire life on fire with flames that come from hell itself.