Salih ibn Dirham said:
We went on the pilgrimage and met a man who asked us: Is there a town near you called al-Ubullah?We said: Yes.He said: Is there any of you who will undertake to pray two or four rak'ahs on my behalf in the mosque of al-Ashshar, stating "they are on behalf of AbuHurayrah"?He (Abu Hurayrah) said: I heard my friend AbulQasim (ﷺ) say: On the Day of Resurrection Allah will raise martyrs from the mosque of al-Ashshar, who will be the only ones to rise with the martyrs of Badr.
Abu Dawud said: This mosque is near the river.
