The Book of Leading the Prayer (Al-Imamah)
10/34. Chapter:
The place in the row that is recommended
Sunan an-Nasai
أَخْبَرَنَا سُوَيْدُ بْنُ نَصْرٍ، قَالَ أَنْبَأَنَا عَبْدُ اللَّهِ، عَنْ مِسْعَرٍ، عَنْ ثَابِتِ بْنِ عُبَيْدٍ، عَنِ ابْنِ الْبَرَاءِ، عَنِ الْبَرَاءِ، قَالَ كُنَّا إِذَا صَلَّيْنَا خَلْفَ رَسُولِ اللَّهِ صلى الله عليه وسلم أَحْبَبْتُ أَنْ أَكُونَ عَنْ يَمِينِهِ .
It was narrated that Al Bara said: "When we prayed behind the Messenger of Allah (ﷺ) I liked to be to his right."
Reference : Sunan an-Nasa'i 822In-book reference : Book 10, Hadith 46English translation : Vol. 1, Book 10, Hadith 823