It was narrated from ‘Umar that he asked the Prophet (ﷺ) ﷺ for permission to do 'Umrah and he gave him permission and said: `O my brother, do not forget us in your supplication.` And he said later in Madinah: `O my brother, include us in your supplication.` ʼUmar said: I would not like to have instead of that everything on which the sun rises, because of him saying: `O my brother.”
Source: sunnah.com
Other translations
Arabic
حَدَّثَنَا مُحَمَّدُ بْنُ جَعْفَرٍ، حَدَّثَنَا شُعْبَةُ، عَنْ عَاصِمِ بْنِ عُبَيْدِ اللَّهِ، عَنْ سَالِمٍ، عَنْ عَبْدِ اللَّهِ بْنِ عُمَرَ، عَنْ عُمَرَ، رَضِيَ اللَّهُ عَنْهُمَا عَنْ النَّبِيِّ صَلَّى اللَّهُ عَلَيْهِ وَسَلَّمَ أَنَّهُ اسْتَأْذَنَهُ فِي الْعُمْرَةِ فَأَذِنَ لَهُ فَقَالَ يَا أَخِي لَا تَنْسَنَا مِنْ دُعَائِكَ وَقَالَ بَعْدُ فِي الْمَدِينَةِ يَا أَخِي أَشْرِكْنَا فِي دُعَائِكَ فَقَالَ عُمَرُ مَا أُحِبُّ أَنَّ لِي بِهَا مَا طَلَعَتْ عَلَيْهِ الشَّمْسُ لِقَوْلِهِ يَا أَخِي.
sunnah.com