(96) باب تَسْوِيَةِ الصُّفُوفِ
Al-Nu'man b. Bashir said:
the prophet (ﷺ) used to straighten us in the rows of prayer as the arrow is straightened, until he thought that we had learned it from him and understood it. One day he turned towards us, and shoulders in order, and say; Do not be irregular. And he would say: Allah and his Angels bless those who near the first rows.
Reference: Sunan Abi Dawud 663
In-book reference: Book 2, Hadith 273
English translation: Book 2, Hadith 663