Scripture?
“But there are some of you who do not believe.” For Jesus knew from the beginning who they were who did not believe, and who it was that would betray Him. (emphasis added)
...
Jesus answered them, “Did I Myself not choose you, the twelve, and yet one of you is a devil?”
Now He meant Judas the son of Simon Iscariot, for he, one of the twelve, was going to betray Him.