Riyad as-Salihin, Book 18, Hadith 1761 (In-Book) ⓘ
Abu Hurairah (May Allah be pleased with him) said: I heard the Messenger of Allah 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."[Al-Bukhari and Muslim].
وعنه قال: سمعت رسول الله صلى الله عليه وسلم يقول: "لا يصومن أحدكم يوم الجمعة إلا يومًا قبله أو بعده" ((متفق عليه)).