Are gargling and sniffing water obligatory in the full ritual bath for major ritual impurity?

Question:
He says: Honorable Shaykh, may Allah grant you success, you mentioned (may Allah preserve you) last night that the full ritual bath removes both major and minor ritual impurity if one intends it. The question is: Are sniffing water and gargling obligatory or not?

Answer:
It is necessary; one’s ritual purity is not completed without gargling and sniffing water. Even in the full ritual bath, gargling and sniffing water are necessary, because the inside of the nose is in a state of major ritual impurity, and the inside of the mouth is...