(25) باب الْغِيبَةِ لِلصَّائِمِ
Narrated Abu Hurairah:
The Prophet (ﷺ) as saying: Fast is a shield ; when one of you is fasting, he should neither behave in an obscene manner nor foolishly. If a man fights or abuses him, he should say: I am fasting, I am fasting.
Reference: Sunan Abi Dawud 2363
In-book reference: Book 14, Hadith 51
English translation: Book 13, Hadith 2356