Sahih al-Bukhari 6607

Sa'id ibn Abi Maryam narrated to us; Abu Ghassan narrated to us; Abu Hazim narrated to me, from Sahl, that a man who was among the Muslims' most effective fighters in a campaign with the Prophet, peace and blessings be upon him, was seen by the Prophet, who said: ‘Whoever wants to see a man destined for the Fire, let him look at this one.’ A man from the group followed him. The fighter remained among the fiercest against the polytheists until he was wounded and sought death quickly. He placed the tip of his sword between his breasts and thrust it through until it came out between his shoulders. The man hurried to the Prophet, peace and blessings be upon him, and said that he testified he was the Messenger of Allah. The Prophet asked what had brought him to that. The man said that the Prophet had indicated a certain man as destined for the Fire, although he had been one of their most effective fighters in defense of the Muslims. He had realized that the man would not die in that state. When wounded, the man sought death quickly and killed himself. At that, the Prophet, peace and blessings be upon him, said: ‘A servant may do the deeds of the people of the Fire while being one of the people of Paradise, or do the deeds of the people of Paradise while being one of the people of the Fire. Deeds are judged by their endings.’