Friday Prayer
Bukhari :: Book 2 :: Volume 13 :: Hadith 16
Narrated Abu Huraira:
The Prophet used to recite the following in the Fajr prayer of Friday, "Alif, Lam, Mim, Tanzil" (Surat-as-Sajda #32) and "Hal-ata-ala-l-Insani" (i.e. Surah-Ad-Dahr #76).