The Prophet ﷺ used to recite the following in the Fajr prayer of Friday, "Alif, Lam, Mim, Tanzil" (Suratas- Sajda #32) and "Hal-ata-ala-l-Insani" (i.e. Surah-Ad-Dahr #76).  

كَانَ النَّبِيُّ ﷺ يَقْرَأُ فِي الْجُمُعَةِ فِي صَلاَةِ الْفَجْرِ {الم * تَنْزِيلُ} السَّجْدَةَ وَ{هَلْ أَتَى عَلَى الإِنْسَانِ}