Merits of the Helpers in Madinah (Ansaar)

Bukhari :: Book 5 :: Volume 58 :: Hadith 137

Narrated Anas bin Malik:

The Prophet said to the Ansar, "After me you will see others given preference to you; so be patient till you meet me, and your promised place (of meeting) will be the Tank (i.e. Lake of Kauthar)."