(25) باب كَيْفَ يُقَوِّمُ الإِمَامُ الصُّفُوفَ
It was narrated that An-Numan bin Bashir said:
"The Messenger of Allah (ﷺ) used to straighten the rows like shaft of an arrow is straightened before the head is attached to it. He saw a man whose chest was sticking out from the row. I saw the Messenger of Allah (ﷺ) say: 'Make your rows straight or Allah will cause your faces to be deformed."
Reference: Sunan an-Nasa'i 810
In-book reference: Book 10, Hadith 34
English translation: Vol. 1, Book 10, Hadith 811