Matthew 12:31
Therefore I tell you, people will be forgiven of every sin and abusive word spoken [against God]. But abusive words spoken against the Holy Spirit will not be forgiven.
Matthew 26:66
What do you people think [i.e., about such statements]?" They answered, "He deserves to die."
Mark 3:28-29
Truly I tell you, all of mankind's sins and the abusive language that they use in speaking against God [and men] can be forgiven.
John 8:58-59
Jesus answered them, "Truly, truly, I tell you, before Abraham was born, I am." [Note: The words "I am" were probably construed as a reference to being Deity. See Ex. 3:14].
John 10:33-36
The Jews answered Him, "We are not stoning you for a good deed, but for your abusive speech [i.e., about God], and because you are claiming to be God, even though you are [only] a man."
Acts 26:11
I often persecuted them in the synagogues, [even] trying to get them to blaspheme [i.e., speak against God]. I had extreme anger toward them and [even] traveled to foreign cities [in my effort] to persecute them.
1 Timothy 1:13
[even] though I had previously spoken against Christ, and persecuted [Christians] and acted outrageously. However, I obtained mercy because I acted out of ignorance, not believing [in Christ].
James 2:7
Do they not speak against the honorable name by which you are called? [i.e., the name "Christ" or "Christian"].