Here's what I found on the subject off the website of a church I recently discovered and will be attending soon It speaks on what Jesus said about the subject in Luke. I also included a link to the sermon from back in 2015 which I'm going to watch now. :)
Blasphemy Against the Holy Spirit (12:8-12)
The warning regarding blasphemy of the Holy Spirit is given in the context of Jesus’ teaching on hypocrisy. He is suggesting that pharisaism, legalism, and hypocrisy are early warning signs of blasphemy, which is the ultimate rejection of the conviction by the Holy Spirit. For even the worst of all sins there is pardon: David’s adultery, dishonesty, and murder; the many sins of the woman in Luke 7; the prodigal son’s “riotous living”; etc. There is always forgiveness to be found in Jesus Christ! But there will be no pardon for the one who pretends all the way to the end, consciously rejecting the Spirit of God, hoping only in his own man-made religion while ignoring the commands of Christ. If you have ever wondered if you have committed the unpardonable sin, you haven’t, and you don’t have to! Be done with self-righteous pretending and look exclusively into the face of our Lord Jesus Christ!