(96) باب تَسْوِيَةِ الصُّفُوفِ
Narrated An-Nu'man ibn Bashir:
The Messenger of Allah (ﷺ) used to straighten our rows when we stood up to pray, and when we were straight, he said: Allah is most great (takbir).
Reference: Sunan Abi Dawud 665
In-book reference: Book 2, Hadith 275
English translation: Book 2, Hadith 665