Is rinsing the mouth and nose obligatory for one who performs ghusl intending to remove both states of ritual impurity?

Question:
He says: Honorable Shaykh, may Allah grant you success, if a person intends with his washing to remove both states of ritual impurity, is it required that rinsing the mouth and nose take place?

Answer:
This is necessary; rinsing the mouth and nose is necessary. First, he cleans himself, then he washes the soiled parts, then he rinses his mouth and nose and pours water over his body. Even if he immerses himself in a large amount of water, such as the sea or a river, intending to remove both states of ritual impurity, there is no harm in that. However, rinsing the mouth and nose is necessary, because the mouth and nose are considered part of the exterior. So, rinsing the mouth and nose is necessary. Yes.