صحيح البخاري
Sahih Bukhari
كتاب الصوم
The Book of As-Saum (The Fasting).
باب قول النبى صلى الله عليه وسلم: إذا توضأ فليستنشق بمنخره الماء . ولم يميز بين الصائم وغيره:
Chapter. The statement of the Prophet ﷺ:“Whoever persforms ablution should put water in his nose and then blow it out.”The Prophet ﷺ did not differentiate between the fasting and non-fasting person (in this respect).