Muhammad bin Abbad bin Ja'far (may Allah have mercy on him) says that I asked Sayyiduna Jabir bin Abdullah (may Allah be pleased with him) (when) he was performing Tawaf of the House of Allah, "Did the Prophet (ﷺ) forbid fasting (nafl) on Friday?" He replied, "Yes, by the Lord of this Ka'bah."
Hadith Referenceالسنن المأثورة / باب ما جاء في الأذان / 291
Hadith Takhrijصحیح مسلم، الصيام، باب كراهة صيام يوم الجمعة منفردا، رقم : 2681