Does swallowing moisture that was on the tongue invalidate the fast?

Chapter on What Nullifies Purification

Al-Mughni

Book of Purification

Book 2 · Issue 3 · Bab 7

Open in Qurani

Primary text

If a person extends their tongue and it becomes wet, and they then retract the tongue and swallow that moisture, the fast is not invalidated. The reason is that the moisture did not establish the legal ruling of separation or exit.