Psalm 109:6
Appoint an evil person over him; may an accuser stand at his right side.
Zechariah 3:1
Then I saw Joshua the High Priest standing in the presence of the angel of the LORD, with Satan standing at his right to oppose him.
Matthew 5:25
Come to terms quickly with your opponent while you are on the way to court, or your opponent may hand you over to the judge, and the judge to the guard, and you will be thrown into prison.
Matthew 27:4
saying, "I have sinned by betraying innocent blood."
John 13:2
By supper time, the Devil had already put it into the heart of Judas, the son of Simon Iscariot, to betray him.
John 13:27
Then he took a piece of bread, dipped it, and gave it to Judas, the son of Simon Iscariot. After he had taken the piece of bread, Satan entered him. Then Jesus told him, "Do quickly what you are going to do!"