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."
أَنَّ رَسُولَ اللَّهِ ﷺ قَالَ إِذَا قُدِّمَ الْعَشَاءُ فَابْدَءُوا بِهِ قَبْلَ أَنْ تُصَلُّوا صَلاَةَ الْمَغْرِبِ وَلاَ تَعْجَلُوا عَنْ عَشَائِكُمْ