With A Flood - Daniel 9:26

Daniel 9:26 ESV 

And after the sixty-two weeks, an anointed one shall be cut off and shall have nothing. And the people of the prince who is to come shall destroy the city and the sanctuary. Its end shall come with a flood, and to the end there shall be war. Desolations are decreed.

Revelation 12:15-17

The serpent poured water like a river out of his mouth after the woman, to sweep her away with a flood. But the earth came to the help of the woman, and the earth opened its mouth and swallowed the river that the dragon had poured from his mouth. Then the dragon became furious with the woman and went off to make war on the rest of her offspring, on those who keep the commandments of God and hold to the testimony of Jesus. And he stood on the sand of the sea.

God said He would never again flood the earth and destroy mankind. The dragon has no compunction about how he destroys mankind. The flood of his destruction comes from his blasphemous mouth, fuming with rebellion and deceit. From his mouth comes the sword of darkness to give battle to the sword of truth from the mouth of the Lord. The word of God will prevail, as will those who keep the commandments of the Lord and hold to the testimony of Jesus.