Does swallowing leftovers can cancel fasting?

Question ???

Does swallowing leftovers can cancel fasting?

Answer:

In fasting, the oral cavity counts outside the body. 

Therefore, gargling does not cancel fasting. 

So that people who fast, 

can perform ablution as when not fasting.

Derivatives from this, 

food scraps between teeth status outside the body. 

If that is possible to avoid but is swallowed intentionally 

then the fast is canceled. 

Thus the statement in the Syafiiyah and Hambali schools.

In the Encyclopaedia Fiqh is stated,

The Syafii'jyah and hambali Madhab set 2 conditions 

for people who swallow leftovers when fasting, 

do not cause fasting to be nullified

The first condition, accidentally swallowing it

Second, he can't avoid it when he swallows hard

Because this person has udzur and accidentally. 

If he is able to avoid it, but he deliberately swallows, 

then he breaks his fast. Although smaller than the hole. 

Because it's not difficult for him to spit it out and avoid it.

(al-Mausu'ah al-Fiqhiyah, 26/64).

This is what the Sheikh Dr. Sholeh al-Fauzan.

His answer was related to leftovers for fasting people,

If someone who is fasting gets the rest 

of his food between his teeth then he must remove 

and clean it from his mouth. 

The presence of food leftovers in the mouth 

does not affect the validity of the fast, 

unless he intentionally swallows it. 

If he swallows it intentionally then it cancels his fast. 

As for if he swallowed the rest of the food 

because he did not know the law or 

because he forgot it did not affect the validity of his fast ...

(Majmu 'Fatawa Shaykh Sholeh al-Fauzan, 2/401)

Allahu a'lam.