وعن أبي هريرة رضي الله عنه
قال: قال رسول الله صلى الله عليه وسلم: «وسطوا الإمام، وسدوا الخلل»
The Messenger of Allah (sallallahu alayhi wa sallam) said, “Let the Imam stand in the middle (so that those praying behind him should be standing both on his right and his left) and close the gaps.”.
Riyad as-Salihin 1096, Book 9, The Book of Virtues, Hadith 106. 1 min read