حَدَّثَنِي عُمَرُ بْنُ الْخَطَّابِ رَضِيَ اللَّهُ عَنْهُ قَالَ لَمَّا كَانَ يَوْمُ خَيْبَرَ أَقْبَلَ نَفَرٌ مِنْ أَصْحَابِ النَّبِيِّ صَلَّى اللَّهُ عَلَيْهِ وَآلِهِ وَسَلَّمَ فَقَالُوا فُلَانٌ شَهِيدٌ فُلَانٌ شَهِيدٌ حَتَّى مَرُّوا عَلَى رَجُلٍ فَقَالُوا فُلَانٌ شَهِيدٌ فَقَالَ رَسُولُ اللَّهِ صَلَّى اللَّهُ عَلَيْهِ وَآلِهِ وَسَلَّمَ كَلَّا إِنِّي رَأَيْتُهُ فِي النَّارِ فِي بُرْدَةٍ غَلَّهَا أَوْ عَبَاءَةٍ ثُمَّ قَالَ رَسُولُ اللَّهِ صَلَّى اللَّهُ عَلَيْهِ وَآلِهِ وَسَلَّمَ يَا ابْنَ الْخَطَّابِ اذْهَبْ فَنَادِ فِي النَّاسِ أَنَّهُ لَا يَدْخُلُ الْجَنَّةَ إِلَّا الْمُؤْمِنُونَ قَالَ فَخَرَجْتُ فَنَادَيْتُ أَلَا إِنَّهُ لَا يَدْخُلُ الْجَنَّةَ إِلَّا الْمُؤْمِنُونَ
Narrated from Sayyiduna Umar bin Khattab (may Allah be pleased with him) that on the day of Khaybar, a group of the noble Companions came and said: “So-and-so is a martyr, so-and-so is a martyr.” In the meantime, they passed by another slain person and said the same about him, that he is a martyr. But the Messenger of Allah (peace and blessings be upon him) said: “Never! I saw him in the Fire because of the striped cloak or garment which he had taken dishonestly.” Then the Prophet (peace and blessings be upon him) said: “O Ibn Khattab! Go and announce among the people that only the believers will enter Paradise.” So I went out from there and made this announcement: “Beware! Only the believers will enter Paradise.”