ولا بأس بالمضمضة والاستنشاق للصائم، فإذا تمضمض واستنشق فلا يبلع ريقه حتى يبزق ثلاثا، وإن تمضمض فدخل الماء حلقه فإن كان ذلك لوضوء الصلاة فلا قضاء عليه.
There is no harm for the fasting person in rinsing the mouth or inhaling water into the nostrils. However, if he does so, he should not swallow his saliva until he spits three times. If water enters his throat while rinsing for ablution (wudu) for prayer, then there is no need for him to make up the fast.
