Revelation 13:5-6

5And the beast was given a mouth (the power of speech), uttering great things and arrogant and blasphemous words, and he was given freedom and authority to act and to do as he pleased for forty-two months (three and a half years).

6And he opened his mouth to speak blasphemies (abusive speech, slander) against God, to blaspheme His name and His tabernacle, and those who live in heaven.