Sunan Ibn Majah — The Chapters on Legal Punishments — Hadith No: 2536
Translation
It was narrated from Bahz bin Hakim, from his father, from his grandfather that the Messenger of Allah (ﷺ) said:“Allah (SWT) will not accept any good deed from a polytheist who committed polytheism after having become Muslim, until he leaves the polytheists and joins the Muslims.”