Merits of the Helpers in Madinah (Ansaar)

Bukhari :: Book 5 :: Volume 58 :: Hadith 154

Narrated Anas bin Malik:

The Prophet said to Ubai, "Allah has ordered me to recite to you: 'Those who disbelieve (Surat-al-Bayina 98).' " Ubai said, "Has He mentioned my name?" The Prophet said, "Yes." On hearing this, Ubai started weeping.