'Accuser' in the Bible

Set a wicked person over him;let an accuser stand at his right hand.

Do not think that I will accuse you to the Father. Your accuser is Moses, on whom you have set your hope.

Then I heard a loud voice in heaven say:The salvation and the powerand the kingdom of our Godand the authority of His Messiahhave now come,because the accuser of our brothershas been thrown out:the one who accuses thembefore our God day and night.