Abdullah bin Umar reported,

He related to him that the Prophet ﷺ prayed at the small mosque that lies before the mosque on the elevated part of ar-Rawha. Abdullah knew the exact spot where the Prophet ﷺ had prayed. He would say, "It is on your right when you stand in the mosque to pray." That mosque sits on the right side of the road as you head toward Makkah, and the distance between it and the larger mosque is about a stone's throw or so.

Bukhari 485

Sahih

وأن

عبد الله بن عمر

حدثه أن النبي ﷺ صلى حيث المسجد الصغير الذي دون المسجد الذي بشرف الروحاء وقد كان عبد الله يعلم المكان الذي كان صلى فيه النبي ﷺ يقول ثم عن يمينك حين تقوم في المسجد تصلي وذلك المسجد على حافة الطريق اليمنى وأنت ذاهب إلى مكة بينه وبين المسجد الأكبر رمية بحجر أو نحو ذلك

البخاري 485صحيح
Contents
Reference
Commentary
Ayat
Collection
Sahih Bukhari
Book
Prayer
Chapter
Mosques along the roads of Madinah, and the places where the Prophet ﷺ prayed
Numbering
Darussalam 485
Bukhari 485