'Blasphemy' in the Bible

“Therefore I say to you, every sin and blasphemy [every evil, abusive, injurious speaking, or indignity against sacred things] will be forgiven people, but blasphemy against the [Holy] Spirit will not be forgiven.

Then the high priest tore his robes [in mock horror] and exclaimed, “He has blasphemed [by making Himself God’s equal]! What further need have we of witnesses or evidence? See, you have now heard the blasphemy.