Castiel eyes had followed Sam's into the corner, even as his hand moved to take Sam's, lending him what little comfort he could. He placed his other hand under Sam's shoulder and lifted, aiming to help him to his feet. He used his Grace to, once again, work the door open.
"It's alright, Sam. He's not here. He's not in here. There is only us." He cast a significant glance at Dean. "It's a warm day. You will find it comfortable outside. You can rest there."