Muhammad ibn ‘Abbād ibn Ja‘far reported: I asked Jābir ibn ‘Abdullāh: "Did the Messenger (may Allah's peace and blessings be upon him) prohibit the fasting of Friday?" He said: 'Yes.' In another version: "By the Lord of the Ka‘bah!" Authentic hadith - An-Nasaa’i - Narrated by Bukhari & Muslim