Matthew 12:32-34

32 And whosoever shall speak a word against the son of man, it shall be forgiven him: [10]but whosoever shall speak against the holy Ghost, it shall not be forgiven him, neither in this world, nor in the world to come.

33 Either make the tree good, and his fruit good: or else make the tree evil, and his fruit evil: for the tree is known by the fruit.

34 [11]O generations of vipers, how can you speak good things, when ye are evil? For of the ⓛabundance of the heart the mouth speaketh.