'Accuses' in the Bible

"Don't think that I will accuse you to the Father. There is one who accuses you, even Moses, on whom you have set your hope.

I heard a loud voice in heaven, saying, "Now is come the salvation, the power, and the Kingdom of our God, and the authority of his Christ; for the accuser of our brothers has been thrown down, who accuses them before our God day and night.