What does the Bible say about lying to the Holy Spirit?

In Acts 5:1-11, we see a grave example of the consequences of lying to the Holy Spirit through the story of Ananias and Sapphira. They not only misrepresented the sale of their property but also presented themselves as generous when they were not. The apostle Peter confronted Ananias about lying 'not unto men, but unto God,' indicating the serious nature of their deception (Acts 5:4). This act showcased not only a lack of integrity but a deeper issue of the heart, reflecting a false profession of faith which can lead to dire consequences. Such deceit undermines the unity and holiness of the church and serves as a warning to believers not to take lightly their commitment to God.