Bani Khadra Mosque is the mosque of Bani Khadra, brothers of Bani Khadara. It is one of the gnomic mosques where it was narrated that the Prophet (PBUH) prayed in.
Hisham bin Urwa was quoted as saying that the Prophet (PBUH) prayed at BaniKhadra Mosque.
The houses of Bani Khadra are located to the south of the Mosque of the Prophet, at their well, called Al-Bassa Well, from which the Prophet (PBUH) drank. No traces of this mosque nowadays.
In order to know all the holy sites the foot of the Prophet (pbuh) had treaded on; download Following Prophet Footprints Application which supports navigation maps without an internet connection.