The Prophet ﷺ said, "When dinner is served and the prayer is called, begin with dinner."The narrator said, Ibn Umar once ate his dinner while he could hear the imam's recitation.
حدثنا عفان حدثنا وهيب حدثنا أيوب عن نافع
عن النبي ﷺ قال إذا وضع العشاء وأقيمت الصلاة فابدءوا بالعشاء قال ولقد تعشى ابن عمر مرة وهو يسمع قراءة الإمام
Its isnad is sahih, and it is a longer version of 5709. Something similar in meaning has already come before with a different, daif isnad, at 4780.