In Revelation chapter 7, there are twelve thousand sealed from the tribes of Israel. Manasses is named, and so is Joseph, apparently for Ephraim. Why is Ephraim not named, though? Dan is not named nor sealed. Where is he? Why is he not named or sealed? Is it because of the idolatry of Judges 18, and then Jeroboam's calf placed there? Or is it because of some other reason?