Well, I don't know if there are any direct prophetic quotes that specifically state "no evil spirit can ever enter a place where they are not invited", and quite frankly I don't feel like going and looking for them. However, this is a conclusion I have come to based on study and inference from a number of less-direct quotes and teachings on the matter. If that makes it a "doctrine of man", so be it.
Sigh... I was really hoping you would. It would help a lot. I've looked and haven't been able to find what you indicate you've found.
I can see coming to the same conclusion as you have if I were not experiencing what I'm experiencing. For I've looked both inward and outward to find the source of the invitation and been unable to find it.
That's why I've come to the conclusion that unless there is an active power preventing their entry into a home or room, they can enter.
My father was away one week and I the only Elder in the house. I called upon my Bishop and asked for him to dedicate the home.
He came and offered a beautiful dedication and I felt safe. Finally I could lay down to rest and I did so fully believing that I was safe.
Yet within 15 minutes of falling asleep, I was woken to see a spirit standing beside my bed which leaned over to me three times, calling me by name each time, and then telling me that evil spirits were coming and that I needed to rise up and cast them out.
Now let us suppose that this was a good spirit. It would indicate that although they had left, they were now returning in force and that what ever power the dedication provided, it would be or was insufficient.
Now let us suppose that this was a evil spirit. This would indicate that either the dedication had no power to prevent their entry or that what ever power it did have was insufficient to do so.
My Bishop himself had commented on how beautiful and good the room looked. He admired my gospel library and the gospel pictures I had upon my wall. I know that there wasn't anything of a material nature that would act as an invitation, and there were no thought sins that I can envision either. I was fully convinced that they could not gain entry.
So if your statement is true, then I am missing something.
I would like it to be true because then I would know where to search rather than needing to consider every other possible explanation.
So please, please, if you're willing, can you back up your belief with the scriptures?
For a long time I held the belief that evil spirits can not enter a temple. Yet in searching as to where this belief came from, I could not find it. Can you? If you can, it would help because it has direct bearing upon the home as well.