Sahih al-Bukhari 2791
Sahih al-Bukhari · Book 56: Fighting for the Cause of Allah (Jihaad) · The grades of the Mujahidun
Narrated Samura:
حَدَّثَنَا مُوسَى ، حَدَّثَنَا جَرِيرٌ ، حَدَّثَنَا أَبُو رَجَاءٍ ، عَنْ سَمُرَةَ ، قَالَ النَّبِيُّ صلى الله عليه وسلم " رَأَيْتُ اللَّيْلَةَ رَجُلَيْنِ أَتَيَانِي فَصَعِدَا بِي الشَّجَرَةَ، فَأَدْخَلاَنِي دَارًا هِيَ أَحْسَنُ وَأَفْضَلُ، لَمْ أَرَ قَطُّ أَحْسَنَ مِنْهَا قَالاَ أَمَّا هَذِهِ الدَّارُ فَدَارُ الشُّهَدَاءِ " .
The Prophet (ﷺ) said, "Last night two men came to me (in a dream) and made me ascend a tree and then admitted me into a better and superior house, better of which I have never seen. One of them said, 'This house is the house of martyrs."