The Ruling on Swallowing Saliva while Fasting | Shaykh Aḥmad ibn Yaḥyá al-Najmī Raḥimahullāh
[Q]: What is the ruling on swallowing saliva?
[A]: Swallowing saliva doesn’t break the fast, even if it is gathered [in his mouth] then swallowed, because it is something which is from the interior of his body. [Also,] it is unavoidable, like swallowing dust.
● [فتح الرب الودود في الفتاوى والرسائل والردود ج ١، ص ٣٢٣]