What to say when you are fasting and someone is rude to you
 

إنِّي صَائِمٌ ,  إنِّي صَائِمٌ

186. 'Inneesaa'imun, 'innee saa'imun.

I am fasting . I am fasting.

Reference: Al-Bukhari, cf. Al-Asqalani, Fathul-BAri 4/103, Muslim 2/806.