The Prophet ﷺ said, "When dinner is served and the prayer is called, begin with dinner."
حدثنا سفيان عن الزهري
أن النبي ﷺ قال إذا وضع العشاء وأقيمت الصلاة فابدءوا بالعشاء
Its isnad is sahih, mentioned previously at 11910.