Matthew 12:32-34

Young's Literal Translation

³² And whoever may speak a word against the Son of Man it shall be forgiven to him, but whoever may speak against the Holy Spirit, it shall not be forgiven him, neither in this age, nor in that which is coming.

³³ `Either make the tree good, and its fruit good, or make the tree bad, and its fruit bad, for from the fruit is the tree known.

³⁴ `Brood of vipers! how are ye able to speak good things -- being evil? for out of the abundance of the heart doth the mouth speak.