Weird question !

So My boyfriend talks in his sleep at night and tonight I decided to start to keep record of what says and a little bit later on after I have already wrote something down he said one of our close mutual friends is the devil and he had to keep me away !

Has anyone ever wondered if what someone says in there sleep might be a actual warning ? Like I'm not saying our friend is the devil but maybe a toxic person ! Any thoughts or has anybody had somewhat of a same occurrence ?