(96) باب تَسْوِيَةِ الصُّفُوفِ
Narrated Anas ibn Malik:
The Prophet (ﷺ) said: Stand close together in your rows, bring them near one another, and stand neck to neck, for by Him in Whose hand my soul is, I see the devil coming in through openings in the row just like a small black sheep.
Reference: Sunan Abi Dawud 667
In-book reference: Book 2, Hadith 277
English translation: Book 2, Hadith 667