(53) باب مَا جَاءَ فِي إِقَامَةِ الصُّفُوفِ
An-Nu'man bin Bashir said:
"Allah's Messenger would straighten our lines. One day he came out and saw a man whose chest was protruding from the people, so he said: 'You must straighten your lines, or Allah will cause disagreement to occur among your faces." (ID)
Reference (ID): Jami` at-Tirmidhi 227 (ID)
In-book reference (ID): Book 2, Hadith 79 (ID)
English translation (ID): Vol. 1, Book 2, Hadith 227 (ID)