The slaves immediately stood up in unison. "Understood," they shouted. They had been trained by slave traders. After obtaining some slaves, it was common sense to give them some simple training, like bowing and such. So these slaves had formed a condition reflex.
Meirin nodded. "A lot has happened today, and I know you're very frightened, but Master said that if you are tired, you can have a good rest. So go rest. But remember, do not run around, do not go near the young master's room, and do not fumble with the stuff inside the space. Understand?"
The slaves understood.