Straighten your rows

Straight rows are part of the perfection of the prayer.

Narrated by Anas ibn Malik

Straighten your rows, for straightening the rows is part of the perfection of the prayer.

Sahih Muslim 433

What this hadith teaches

This is why imams say "Straighten the rows" before starting, and why Masjid TV shows it on the screen at prayer time.

Reference and grade

Grade
Sahih (in Sahih Muslim)
Narrator
Anas ibn Malik

The hadith in Arabic نص الحديث

سَوُّوا صُفُوفَكُمْ فَإِنَّ تَسْوِيَةَ الصَّفِّ مِنْ تَمَامِ الصَّلاَةِ

Arabic text of Sahih Muslim 433, as given on sunnah.com.