Sahih al-Bukhari, Hadith 4846 ⓘ

Narrated Anas bin Malik: The Prophet missed Thabit bin Qais for a period (So he inquired about him). A man said. "O Allah's Apostle! I will bring you his news." So he went to Thabit and found him sitting in his house and bowing his head. The man said to Thabit, " 'What is the matter with you?" Thabit replied that it was an evil affair, for he used to raise his voice above the voice of the Prophet and so all his good deeds had been annulled, and he considered himself as one of the people of the Fire. Then the man returned to the Prophet and told him that Thabit had said, so-and-so. (Musa bin Anas) said: The man returned to Thabit with great glad tidings. The Prophet said to the man. "Go back to him and say to him: "You are not from the people of the Hell Fire, but from the people of Paradise."

حَدَّثَنَا عَلِيُّ بْنُ عَبْدِ اللَّهِ، حَدَّثَنَا أَزْهَرُ بْنُ سَعْدٍ، أَخْبَرَنَا ابْنُ عَوْنٍ، قَالَ أَنْبَأَنِي مُوسَى بْنُ أَنَسٍ، عَنْ أَنَسِ بْنِ مَالِكٍ ـ رضى الله عنه ـ أَنَّ النَّبِيَّ صلى الله عليه وسلم افْتَقَدَ ثَابِتَ بْنَ قَيْسٍ فَقَالَ رَجُلٌ يَا رَسُولَ اللَّهِ أَنَا أَعْلَمُ لَكَ عِلْمَهُ‏.‏ فَأَتَاهُ فَوَجَدَهُ جَالِسًا فِي بَيْتِهِ مُنَكِّسًا رَأْسَهُ فَقَالَ لَهُ مَا شَأْنُكَ‏.‏ فَقَالَ شَرٌّ‏.‏ كَانَ يَرْفَعُ صَوْتَهُ فَوْقَ صَوْتِ النَّبِيِّ صلى الله عليه وسلم فَقَدْ حَبِطَ عَمَلُهُ، وَهْوَ مِنْ أَهْلِ النَّارِ‏.‏ فَأَتَى الرَّجُلُ النَّبِيَّ صلى الله عليه وسلم فَأَخْبَرَهُ أَنَّهُ قَالَ كَذَا وَكَذَا ـ فَقَالَ مُوسَى ـ فَرَجَعَ إِلَيْهِ الْمَرَّةَ الآخِرَةَ بِبِشَارَةٍ عَظِيمَةٍ فَقَالَ ‏ "‏ اذْهَبْ إِلَيْهِ فَقُلْ لَهُ إِنَّكَ لَسْتَ مِنْ أَهْلِ النَّارِ، وَلَكِنَّكَ مِنْ أَهْلِ الْجَنَّةِ ‏" ‏‏.‏