Sahih Muslim Book 4, Hadith 139

This is what was transmitted to us by Abu Huraira from the Messenger of Allah (ﷺ) and, while making a mention of a few ahadith, said: (The Messengerof Allah directed us thus): Establish rows in prayer, for the making of a row (straight) is one of the merits of prayer.

Previous Hadith

The Messenger of Allah (ﷺ) said: Complete the rows, for I can see you behind my back.

Sahih Muslim Book 4, Hadith 138
Next Hadith

I heard the Messenger of Allah (ﷺ) say: Straighten your rows, or Allah would create dissension amongst you.

Sahih Muslim Book 4, Hadith 140