'Evil speaking' in the Bible

I have known thy works, and tribulation, and poverty -- yet thou art rich -- and the evil-speaking of those saying themselves to be Jews, and are not, but are a synagogue of the Adversary.

And I stood upon the sand of the sea, and I saw out of the sea a beast coming up, having seven heads and ten horns, and upon its horns ten diadems, and upon its heads a name of evil speaking,

and it did open its mouth for evil-speaking toward God, to speak evil of His name, and of His tabernacle, and of those who in the heaven tabernacle,

and he carried me away to a wilderness in the Spirit, and I saw a woman sitting upon a scarlet-coloured beast, full of names of evil-speaking, having seven heads and ten horns,