Narrator:Abu Hurayrah
حَدَّثَنَا مُسَدَّدٌ، حَدَّثَنَا سُفْيَانُ، عَنْ أَبِي الزِّنَادِ، عَنِ الأَعْرَجِ، عَنْ أَبِي هُرَيْرَةَ، قَالَ قَالَ رَسُولُ اللَّهِ صلى الله عليه وسلم "
إِذَا دُعِيَ أَحَدُكُمْ إِلَى طَعَامٍ وَهُوَ صَائِمٌ فَلْيَقُلْ إِنِّي صَائِمٌ "
Abu 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.
Reported by Abu Dawud (No. 2461), Muslim (No. 1150), At-Tirmidhi (No. 781), Ibn Majah (No. 1750), Ahmad (No. 7003) and Ad-Darimi (No. 1674).