[ That's an obvious lie, and Castiel should be grateful, perhaps, that he's being lied to instead of having the plate thrown at him, but he gives Dean a full-headed eye roll all the same before forcing the cup on Dean again. ]

Drink.

[ Mostly that, though the food is important, too. All of it is important, not just for Dean's sake, to keep him alive, to heal him and return him to good health, but to show Dean's cooperation, and earn Castiel's family's trust again, for both of them. Castiel isn't shy about explaining it. ]

You need to eat. You need your strength if you plan to plot some sort of outlandish escape, and you need your captors to believe you're cooperating with them if you ever intend to slip this literal leash you're wearing. Martyring yourself only brings you closer to God.

[ Which, really, should be a good thing, and Castiel should be following Dean's example and refusing food himself rather than correcting Dean's behavior, but somehow through the ordeal of Dean's capture, this whole God's chosen thing has become less important to Castiel than the man himself. ]