Once the Prophet ﷺ called the Ansar in order to grant them part of the land of Bahrain. On that they said, "No! By Allah, we will not accept it unless you grant a similar thing to our Quarries brothers as well." He said, "That will be their's if Allah wishes." But when the Ansar persisted in their request, he said, "After me you will see others given preference over you in this respect (in which case) you should be patient till you meet me at the Tank (of Al-Kauthar). (Using translation from Bukhārī 3163)   

سَمِعْتُ أَنَسًا ؓ يَقُولُ دَعَا رَسُولُ اللهِ ﷺ الْأَنْصَارَ لِيَكْتُبَ لَهُمْ بِالْبَحْرَيْنِ فَقَالُوا لَا وَاللهِ حَتَّى تَكْتُبَ لِإِخْوَانِنَا مِنْ قُرَيْشٍ بِمِثْلِهَا فَقَالَ ذَاكَ لَهُمْ مَا شَاءَ اللهُ كُلُّ ذَاكَ يَقُولُونَ لَهُ فَقَالَ إِنَّكُمْ سَتَرَوْنَ بَعْدِي أَثَرَةً فَاصْبِرُوا حَتَّى تَلْقَوْنِي  

[Machine] Narrated that the Messenger of Allah ﷺ conquered Al-Bahrain and wanted to write a letter to them. They said, "No, not until you give our brothers from Quraysh something like it." So the Messenger of Allah ﷺ said, "Indeed, you will see after me difficulty, so be patient until you meet me."  

فَحَدَّثَنَا أَنَّ رَسُولَ اللهِ ﷺ أَقْطَعَ الْأَنْصَارَ الْبَحْرَيْنِ وَأَرَادَ أَنْ يَكْتُبَ لَهُمْ بِهَا كِتَابًا فَقَالُوا لَا حَتَّى تُعْطِيَ إِخْوَانَنَا مِنْ قُرَيْشٍ مِثْلَهَا فَقَالَ رَسُولُ اللهِ ﷺ إِنَّكُمْ سَتَرَوْنَ بَعْدِي أَثَرَةً فَاصْبِرُوا حَتَّى تَلْقَوْنِي