It wasnarrated from Mus'ab bin Sa'd that his father said:
"For theFajr prayer on Fridays, the Messenger of Allah (ﷺ) used to recite'Alif-Lam-Mim. The revelation...' [32:1] and 'Has there notbeen overman...'" [76:1]
English reference: Vol. 1, Book 5, Hadith 822
Arabic reference: Book 5, Hadith 871