Compiled by Imam Yahya ibn Sharaf al-Nawawi
وعنه 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."[Al-Bukhari and Muslim].