Prayer (Kitab Al-Salat)

Dawud :: Book 2 : Hadith 667

Narrated Anas ibn Malik:

The Prophet (peace_be_upon_him) 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.