Hadith 627
Sayyiduna Abu Dharr Ghifari (may Allah be pleased with him) narrates this statement of the Prophet (peace and blessings be upon him): "Indeed, Allah Almighty continues to forgive His servant until the barrier occurs." The people asked: "O Messenger of Allah! What is meant by the occurrence of the barrier?" The Prophet (peace and blessings be upon him) said: "That a person dies in such a state that he is a polytheist."