Hadith.1244 - Dawud ibn Sirhan narrated from Imam Jafar ibn Muhammad Al-Sadiq عليه السلام regarding the verse of Allah سبحانه وتعالى, the Exalted, "By the witness and the witnessed" (Surah Al-Buruj 85:3).
Imam عليه السلام said: "The 'witness' is the day of Jumu’ah."