Chapter on the Extent of Illness That Permits Breaking the Fast

Man Lā Yaḥḍuruh al-Faqīh|Volume 2|Book 2|Chapter 19

Volume 2, Book 2, Chapter 19

وَ قَالَ عَلَيْهِ اَلسَّلاَمُ: «كُلُّ مَا أَضَرَّ بِهِ اَلصَّوْمُ فَالْإِفْطَارُ لَهُ وَاجِبٌ».

Imam said: "Anything that harms a person due to fasting makes breaking the fast obligatory for them."