Hadith 614B

وَحَدَّثَنِي ، عَنْ مَالِك ، أَنَّهُ سَمِعَ أَهْلَ الْعِلْمِ يَقُولُونَ : لَا بَأْسَ بِصِيَامِ الدَّهْرِ إِذَا أَفْطَرَ الْأَيَّامَ الَّتِي نَهَى رَسُولُ اللَّهِ صَلَّى اللَّهُ عَلَيْهِ وَسَلَّمَ عَنْ صِيَامِهَا ، وَهِيَ أَيَّامُ مِنًى وَيَوْمُ الْأَضْحَى وَيَوْمُ الْفِطْرِ فِيمَا بَلَغَنَا ، قَالَ : وَذَلِكَ أَحَبُّ مَا سَمِعْتُ إِلَيَّ فِي ذَلِكَ
Imam Malik, may Allah have mercy on him, said: I have heard from the people of knowledge that there is nothing wrong with fasting continuously, as long as one does not fast on those days in which the Messenger of Allah, peace and blessings be upon him, has prohibited fasting. And those are three days while staying in Mina, that is, the 11th, 12th, and 13th of Dhul-Hijjah, and one is the day of Fitr and one is the day of Adha, and this is what we prefer.
Hadith Reference موطا امام مالك رواية يحييٰ / كتاب الصيام / 614B
Hadith Takhrij «شركة الحروف نمبر: 618، فواد عبدالباقي نمبر: 18 - كِتَابُ الصِّيَامِ-ح: 37»