(50) باب النَّهْىِ أَنْ يُخَصَّ يَوْمُ الْجُمُعَةِ بِصَوْمٍ
Narrated Abu Hurairah:
The Messenger of Allah (ﷺ) as saying: None of you must fast on Friday unless he fasts the day before or the day after. (ID)
Reference (ID): Sunan Abi Dawud 2420 (ID)
In-book reference (ID): Book 14, Hadith 108 (ID)
English translation (ID): Book 13, Hadith 2414 (ID)