Matthew 12:31-33 NIV

[31] And so I tell you, every kind of sin and slander can be forgiven, but blasphemy against the Spirit will not be forgiven. [32] Anyone who speaks a word against the Son of Man will be forgiven, but anyone who speaks against the Holy Spirit will not be forgiven, either in this age or in the age to come. [33] “Make a tree good and its fruit will be good, or make a tree bad and its fruit will be bad, for a tree is recognized by its fruit.