(109) باب الدُّنُوِّ مِنَ السُّتْرَةِ
Sahl said:
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.
Reference: Sunan Abi Dawud 696
In-book reference: Book 2, Hadith 306
English translation: Book 2, Hadith 696