None among you should observe fast on Friday, but only that he observes fast before it and after it. (Using translation from Muslim 1144a)
قَالَ رَسُولُ اللهِ ﷺ «لَا يَصُمْ أَحَدُكُمْ يَوْمَ الْجُمُعَةِ إِلَّا أَنْ يَصُومَ قَبْلَهُ يَوْمًا أَوْ يَصُومَ بَعْدَهُ يَوْمًا»