Fortress of the Muslim (Hisn al-Muslim)
حصن المسلم
(75) Chapter: When insulted while fasting
(75) ما يقول الصائم إذا سابه أحد
Hisn al-Muslim 186 
Innī ṣā'im, innī ṣā'im. I am fasting. I am fasting. Reference: Al-Bukhari, cf. Al-Asqalani, Fathul-BAri 4/103, Muslim 2/806.
إِنِّي صَائِمٌ، إِنِّي صَائِمٌ
Reference : Hisn al-Muslim 186