Hadiths Concerning Bad Deaths

1- Reported Muslim that Abu-Huraira, may Allah be pleased with him, narrated that Prophet Muhammad, may the peace and blessings of Allah be upon him, said; "A person might carry out all the good deeds that would lead to paradise for a long period of time, only to end them with evil deeds that lead him to hell. And another might carry out all the evil deeds that would load to hell for a long period of time, only to end them with good deeds that lead him to paradise." (Hadith Sahih reported by a succession of narrators)

2- Quoted from Bukhari is Sahl Ibn Sa'ad's narration that Prophet Muhammad, may the peace and blessings of Allah be upon him, once said: "A servant of Allah might be doing the very sins that would plunge him into hell although he belongs to the people of paradise; and another might be carrying out good deeds although he belongs to the folk of hell-fire because ending actions are what really counts." (Hadith Sahih)

3- Sayeda A'isha, may Allah be pleased with her, said: "Prophet Muhammad, may the peace and blessings of Allah be upon him, used frequently to say: "O Allah! You can change hearts, so please keep my heart unwavering in obeying your orders." So, I said: "O prophet of Allah! You frequently pray like this; what do you fear? He replied: "How can I feel secure, A'isha, and the hearts of the people are located between two fingers of Allah's? If He chooses to change a man's heart, He instantaneously does." (Hadith Sahih)