Revelation 2:16

2:16 Therefore, repent! If not, I will come against you quickly and make war against those people with the sword of my mouth.

Revelation 12:15-16

12:15 Then the serpent spouted water like a river out of his mouth after the woman in an attempt to sweep her away by a flood, 12:16 but the earth came to her rescue; the ground opened up and swallowed the river that the dragon had spewed from his mouth.

Revelation 13:5-6

13:5 The beast was given a mouth speaking proud words and blasphemies, and he was permitted to exercise ruling authority for forty-two months. 13:6 So the beast opened his mouth to blaspheme against God – to blaspheme both his name and his dwelling place, that is, those who dwell in heaven.

Revelation 19:21

19:21 The others were killed by the sword that extended from the mouth of the one who rode the horse, and all the birds gorged themselves with their flesh.

Revelation 13:2

13:2 Now the beast that I saw was like a leopard, but its feet were like a bear’s, and its mouth was like a lion’s mouth. The dragon gave the beast his power, his throne, and great authority to rule.