The Prophet (ﷺ) said, If supper is served and the Iqama for (Isha) prayer is proclaimed, start with you supper first."
Sahih al-Bukhari Book 70, Hadith 92
← Previous Hadith That he saw Allah's Messenger (ﷺ) cutting a piece of mutton from its shoulder part he was carrying in his hand. When he was called for prayer, he put it down and the knife with which he was cutting it. Then he stood up and offered the prayer without performing new ablution.

Sahih al-Bukhari Book 70, Hadith 91 Next Hadith → Once Ibn Umar was taking his supper while he was listening to the recitation of (Quran by) the Imam (in the Isha prayer).

Sahih al-Bukhari Book 70, Hadith 93