Chapter on Miscellaneous Topics
Man Lā Yaḥḍuruh al-Faqīh|Volume 2|Book 2|Chapter 36
وَ سَأَلَ زُرَارَةُ أَبَا عَبْدِ اَللَّهِ عَلَيْهِ اَلسَّلاَمُ: عَنْ صَوْمِ اَلدَّهْرِ فَقَالَ «لَمْ يَزَلْ مَكْرُوهاً».
Zurara asked Abu Abdullah عليه السلام about fasting continuously throughout the year. Imam عليه السلام replied: "It has always been disliked."
- Ṣaḥīḥ al-Faqīh, p. 108