Musannaf Ibn Abi Shaybah

Hazrat Hakam narrates from some people of Madinah, among whom was Hazrat Abu Ja'far, that on the day of Jumu'ah, Surah Al-Jumu'ah and Surah Al-Munafiqun used to be recited. In Surah Al-Jumu'ah, glad tidings were given to the believers and they were encouraged, and in Surah Al-Munafiqun, the hypocrites were warned and their spirits were dampened.