Messenger of Allah ﷺ said, "If the supper is served start having it before praying the Maghrib prayer and do not be hasty in finishing it." (Using translation from Bukhārī 672)
أَنَّ رَسُولَ اللهِ ﷺ قَالَ إِذَا قُدِّمَ الْعَشَاءُ فَابْدَءُوا بِالْعَشَاءِ قَبْلَ أَنْ تُصَلُّوا صَلَاةَ الْمَغْرِبِ وَلَا تَعْجَلُوا عَنْ عَشَائِكُمْ