(24) باب كَرَاهِيَةِ صِيَامِ يَوْمِ الْجُمُعَةِ مُنْفَرِدًا
Abu Huraira (Allah be pleased with him) reported Allah's Apostle (ﷺ) as saying:
Do not single out the night (preceding) Friday among the nights for prayer and do not single out Friday among days for fasting but only when anyone among you is accustomed to fast (on dates) which coincide with this day (Friday).
Reference: Sahih Muslim 1144 b
In-book reference: Book 13, Hadith 190
USC-MSA web (English) reference(deprecated numbering scheme): Book 6, Hadith 2546