Sunan Abi Dawud Book 2, Hadith 307
When one of you prays, he should not let anyone pass in front of him; he should turn him away as far as possible; but if he refuses (to go), he should fight him, for he is only a devil.
The distance between the place where the Prophet (ﷺ) stood and the qiblah (i.e. the sutrah or the wall of the mosque) was as much as to allow a goat to pass.
When one of you prays, he should pray facing the sutrah (screen or covering) and he should keep himself close to it. He then narrated the tradition to the same effect.