Samurah (May Allah be pleased with him) reported:
The Messenger of Allah (ﷺ) said, "Last night two men (angels) came to me (in a dream) and made me ascend a tree and then admitted me into a nice and excellent house, the like of which I have never seen before. One of them said: 'This house is the house of martyrs'."[Al- Bukhari].
App reference: Book 12, Hadith 34
Arabic/English book reference: Book 12, Hadith 1318