Hadithcore
Sahih Muslim, 114
sahih

It is narrated on the authority of 'Umar b. Khattab that when it was the day of Khaibar a party of Companions of the Messenger (ﷺ) came there and said:

So and so is a martyr, till they happened to pass by a man and said: So and so is a martyr. Upon this the Messenger of Allah remarked: Nay, not so verily I have seen him in the Fire for the garment or cloak that he had stolen from the booty, Then the Messenger of Allah (ﷺ) said: Umar son of Khattab, go and announce to the people that none but the believers shall enter Paradise. He ('Umar b. Khattab) narrated: I went out and proclaimed: Verily none but the believers would enter Paradise.

حَدَّثَنِي زُهَيْرُ بْنُ حَرْبٍ، حَدَّثَنَا هَاشِمُ بْنُ الْقَاسِمِ، حَدَّثَنَا عِكْرِمَةُ بْنُ عَمَّارٍ، قَالَ حَدَّثَنِي سِمَاكٌ الْحَنَفِيُّ أَبُو زُمَيْلٍ، قَالَ حَدَّثَنِي عَبْدُ اللَّهِ بْنُ عَبَّاسٍ، قَالَ حَدَّثَنِي عُمَرُ بْنُ الْخَطَّابِ، قَالَ لَمَّا كَانَ يَوْمُ خَيْبَرَ أَقْبَلَ نَفَرٌ مِنْ صَحَابَةِ النَّبِيِّ صلى الله عليه وسلم فَقَالُوا فُلاَنٌ شَهِيدٌ فُلاَنٌ شَهِيدٌ حَتَّى مَرُّوا عَلَى رَجُلٍ فَقَالُوا فُلاَنٌ شَهِيدٌ ‏.‏ فَقَالَ رَسُولُ اللَّهِ صلى الله عليه وسلم ‏"‏ كَلاَّ إِنِّي رَأَيْتُهُ فِي النَّارِ فِي بُرْدَةٍ غَلَّهَا أَوْ عَبَاءَةٍ ‏"‏ ‏.‏ ثُمَّ قَالَ رَسُولُ اللَّهِ صلى الله عليه وسلم ‏"‏ يَا ابْنَ الْخَطَّابِ اذْهَبْ فَنَادِ فِي النَّاسِ إِنَّهُ لاَ يَدْخُلُ الْجَنَّةَ إِلاَّ الْمُؤْمِنُونَ ‏"‏ ‏.‏ قَالَ فَخَرَجْتُ فَنَادَيْتُ ‏"‏ أَلاَ إِنَّهُ لاَ يَدْخُلُ الْجَنَّةَ إِلاَّ الْمُؤْمِنُونَ ‏"‏ ‏.‏

References2 variants
In-Book Reference
Book 1, Hadith 216
USC-MSA web (English) reference
Book 1, Hadith 209 (deprecated numbering scheme)
Sharh · explanationclick to expand
The true belief in Allah and what it requires is a reason for entering Paradise. A heart’s belief is followed by a clear obedience in one's behavior and acts. In this hadith, Omar ibn Al-Khattab narrated a situation after Khaybar battle that occurred between Muslims and Jews in the 7th year AH. It was a village inhabited by Jews about 153 Km north of Medina. After the battle, some of the Prophet's Companions were counting this battle's martyrs until they mentioned a man and said, "So-and-so is a martyr." The Prophet ﷺ commented, "No. I have seen him in Hell for a mantle - or cloak - which he has stolen." A cloak is a black square garment. He took it from the spoils without the Prophet's knowledge and consent. He did not give it to the Prophet within the spoils to be divided later. The Prophet ﷺ commanded Omar to go and announce among people that none will enter Paradise but believers. None will initially enter it except those believing in Allah outwardly and inwardly. It was a stern warning to those violating Allah's and the Prophet's commands, for a believer may be punished in Hell for his sins. Afterward, Allah may save him if he wills. In Sahih Muslim, Abu Hurairah narrated that the Prophet ﷺ said, "He is not a believer who defrauds and steals (from the spoils)." Both the Quran and Sunnah clearly mentioned that it is the one who steals war spoils before they are divided. He will come on the Day of Resurrection with the thing he gained. Allah said, "And whoever betrays, [taking unlawfully], will come with what he took on the Day of Resurrection." (Aal-Imran: 161) This hadith contains the following benefits: (1) It is permissible to praise the dead and mention their virtues, (2) It warns against stealing spoils or public funds, (3) It confirms that stealing spoils contradicts faith, for this person commits a hidden sin while openly betraying Allah only. If he had been a true believer, he would not have hidden from people while openly committing it before Allah, and (4) The quality of faith may be removed due to evil acts..
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