Sunan Abi Dawud 2461
سنن أبي داود#2461SahihAbu Hurairah reported Messenger of Allah (ﷺ) as saying:When one of you is invited (to a meal), and he is fasting, he should say that he is fasting
Scholarly Authentication
We show the most cautious grade (weakest-wins) as the overall label. Individual scholars graded it as follows:
Al-AlbaniSahih
Muhammad Muhyi Al-Din Abdul HamidSahih
Shuaib Al ArnautSahih
Zubair Ali ZaiSahih Muslim (1150)
In-book reference: 14:149