Narrated Anas:

that the Prophet (ﷺ) said: "I entered Paradise and it was as if I was in a palace of gold. So I said: 'Whose palace is this?' They said: 'A youth's, from the Quraish.' So I thought that I was him. I said: 'And who is he?' They said: "'Umar bin Al-Khattab."

حَدَّثَنَا عَلِيُّ بْنُ حُجْرٍ، قَالَ حَدَّثَنَا إِسْمَاعِيلُ بْنُ جَعْفَرٍ، عَنْ حُمَيْدٍ، عَنْ أَنَسٍ، أَنَّ النَّبِيَّ صلى الله عليه وسلم قَالَ ‏

‏ دَخَلْتُ الْجَنَّةَ فَإِذَا أَنَا بِقَصْرٍ مِنْ ذَهَبٍ فَقُلْتُ لِمَنْ هَذَا الْقَصْرُ قَالُوا لِشَابٍّ مِنْ قُرَيْشٍ فَظَنَنْتُ أَنِّي أَنَا هُوَ فَقُلْتُ وَمَنْ هُوَ فَقَالُوا عُمَرُ بْنُ الْخَطَّابِ ‏

‏ ‏.‏ هَذَا حَدِيثٌ حَسَنٌ صَحِيحٌ ‏.‏