If supper or dinner is served (when the time for Salat is due). Sahih al-Bukhari 5464
Arabic hadith text
وَعَنْ أَيُّوبَ عَنْ نَافِعٍ عَنِ ابْنِ عُمَرَ عَنِ النَّبِيِّ صلى الله عليه وسلم نَحْوَهُ.
وَعَنْ أَيُّوبَ، عَنْ نَافِعٍ، عَنِ ابْنِ عُمَرَ، أَنَّهُ تَعَشَّى مَرَّةً وَهْوَ يَسْمَعُ قِرَاءَةَ الإِمَامِ
Translation
Narrated Nafi
Once Ibn Umar was taking his supper while he was listening to the recitation of (Quran by) the Imam (in the Isha prayer).