Bir Maona also known as Bir Ma'una is a location in Saudi Arabia. The Expedition of Bir Maona took place here where 70 Muslim were killed. It used to be a well at the time
Bir Maona is mentioned in the Sunni hadith collection Sahih Bukhari, as follows:
According to Mubarakpuri, Quran 3:169-173 is also related to the Bir Maona, and the verse was later abrogated.
References
Bir Maona Wikipedia(Text) CC BY-SA