Sahih al-Bukhari, Volume 7, Book 65, Hadith 373 (USC-MSA) ⓘ
Narrated Anas bin Malik: The Prophet said, If supper is served and the Iqama for (Isha) prayer is proclaimed, start with you supper first."
حَدَّثَنَا مُعَلَّى بْنُ أَسَدٍ، حَدَّثَنَا وُهَيْبٌ، عَنْ أَيُّوبَ، عَنْ أَبِي قِلاَبَةَ، عَنْ أَنَسِ بْنِ مَالِكٍ ـ رضى الله عنه ـ عَنِ النَّبِيِّ صلى الله عليه وسلم قَالَ " إِذَا وُضِعَ الْعَشَاءُ وَأُقِيمَتِ الصَّلاَةُ فَابْدَءُوا بِالْعَشَاءِ " .
also referenced under: Book 70, Hadith 92 (In-Book) & Hadith 5463 (DarusSalam)
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).
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.
also referenced under: Book 70, Hadith 93 (In-Book) & Hadith 5464 (DarusSalam)