(63) بَابُ صَوْمِ يَوْمِ الْجُمُعَةِ، فَإِذَا أَصْبَحَ صَائِمًا يَوْمَ الْجُمُعَةِ فَعَلَيْهِ أَنْ يُفْطِرَ
Narrated Muhammad bin `Abbas:
I asked Jabir "Did the Prophet (ﷺ) forbid fasting on Fridays?" He replied, "Yes." (Other narrators added, "If he intends to fast only that day.") (ES)
Reference (ES): Sahih al-Bukhari 1984 (ES)
In-book reference (ES): Book 30, Hadith 91 (ES)
USC-MSA web (English) reference(deprecated numbering scheme): Vol. 3, Book 31, Hadith 205 (ES)