مِشْكَاةُ الْمَصَابِيحِ
Mishkat al-Masabih 2052
Fasting
Voluntary Fasting - Section 1
وَعَنْ أَبِي هُرَيْرَةَ رَضِيَ اللَّهُ عَنْهُ قَالَ: قَالَ رَسُولُ اللَّهِ صَلَّى اللَّهُ عَلَيْهِ وَسَلَّمَ: «لَا تَخْتَصُّوا لَيْلَةَ الْجُمُعَةِ بِقِيَامٍ مِنْ بَيْنِ اللَّيَالِي وَلَا تَخْتَصُّوا يَوْمَ الْجُمُعَةِ بِصِيَامٍ مِنْ بَيْنِ الْأَيَّامِ إِلَّا أَنْ يَكُونَ فِي صَوْمٍ يَصُومهُ أحدكُم» . رَوَاهُ مُسلم
He reported God’s messenger as saying, “Do not choose Thursday night as a particular night for prayer, and do not choose Friday as a particular day for fasting, unless it occurs during a fast one of you is observing.” Muslim transmitted it.
Mishkat al-Masabih, 2052صَحِيحٌ (الألباني)