Cas paused, tilting his head curiously as the weapon was placed against his vessels throat.While a normal person would have been at least a little startled, Cas merly stared at Sam patiently.The knife couldn't cause any damage to him anyway, at least none that he couldn't heal from at any rate so the angel was barley even phased.
"You are Samuel Winchester, brother to Dean Winchester."He stated needlessly, studying the young hunter closely as if confused as to why he would threaten an angel of the lord.Tilting his head further."I am here because my orders are to take you on a holy mission.Your presence is much required."He continued calmly.Staring at Sam blankly, waited for the hunter to get to his feet and begin to pack.He didn't know the elder Winchesters location at present, but he was sure Samuel would contact him, considering his orders came from the All Father.