Hadith
Riyad as-Salihin #1082
The Book of the Prohibited actions· كتاب الأمور المنهي عنها
riyad_as_salihin:1082وعنه قال: سمعت رسول الله صلى الله عليه وسلم يقول: "لا يصومن أحدكم يوم الجمعة إلا يومًا قبله أو بعده" ((متفق عليه)).
I heard the Messenger of Allah (ﷺ) as saying: "None of you should observe fast on Friday except that he should observe fast either one day before it or one day after it.".
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