(28) باب تَسْوِيَةِ الصُّفُوفِ وَإِقَامَتِهَا وَفَضْلِ الأَوَّلِ فَالأَوَّلِ مِنْهَا وَالاِزْدِحَامِ عَلَى الصَّفِّ الأَوَّلِ وَالْمُسَابَقَةِ إِلَيْهَا وَتَقْدِيمِ أُولِي الْفَضْلِ وَتَقْرِيبِهِمْ مِنَ الإِمَامِ
Abu Huraira reported:
The Messenger of Allah (ﷺ) said: If you were to know, or if they were to know, what (excellence) lies in the first rows, there would have been drawing of lots (for filling them) ; and Ibn Harb said: For (occupying) the first row there would have been drawing of lots.
Reference: Sahih Muslim 439
In-book reference: Book 4, Hadith 146
USC-MSA web (English) reference(deprecated numbering scheme): Book 4, Hadith 880