The Messenger of Allah ﷺ said, "When one of you stands up from his seat" — and in another narration, "Whoever stands up from his seat" — "and then returns to it, he has the greater right to it."
أن رسول الله ﷺ قال: إذا قام أحدكم- وفي رواية: من قام- من مجلسه ثم رجع إليه فهو أحق به.