On Fridays the Prophet ﷺ used to recite Alif Lam Mim Tanzil-As-Sajda (in the first rakʿa) and Hal ata ʿalal-insani i.e. Surat ad-Dahr (LXXVI) (in the second rakʿa), in the Fajr prayer.  

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