Is it permissible to rinse the nose and mouth during the day in Ramadaan for one who is fasting?.
Praise be to Allaah.
It is proven that the Messenger of Allaah (peace and
blessings of Allaah be upon him) said to al-Laqeet ibn Saburah: “Do wudoo’
well and make the water go between your fingers, and be thorough in rinsing
the nose, unless you are fasting.” So he (peace and blessings of Allaah
be upon him) told him to do wudoo’ well then he said: “…and be thorough in
rinsing the nose, unless you are fasting.” This indicates that the fasting
person may rinse his mouth and nose, but he should not be too thorough in
doing so lest the water reach his throat. As for rinsing the nose and mouth,
they are essential when doing wudoo’ and ghusl, because they are obligatory
parts of those actions, whether one is fasting or not. End quote.
Shaykh ‘Abd al-‘Azeez ibn Baaz (may Allaah have mercy on him)
Majmoo’ Fataawa wa Maqaalaat Mutanawwi’ah (15/280).