If a parent says leave this house will I be in trouble

Please tell us more about what's going on.

If YOUR parent says to leave YOUR house that might be considered abandonment.

If its your friends parent telling you to leave THEIR house, then you leave immediately.

As you can see there was not enough info in your question to answer effectively.

Assuming it is not YOUR parent, the parent and/or adult who is in control of the home, has the right to tell anyone in that home to leave. If you do not they can merely call the police and have you arrested for tresspass among possible other charges.

If you are an adult child living at home, they can tell you to get out, but will have to do a legal eviction to get you out if you will not just go.