أَخْبَرَنَا مُحَمَّدُ بْنُ مَنْصُورٍ، قَالَ حَدَّثَنَا سُفْيَانُ، عَنِ الزُّهْرِيِّ، عَنْ أَنَسٍ، قَالَ قَالَ رَسُولُ اللَّهِ صلى الله عليه وسلم ‏"‏ إِذَا حَضَرَ الْعَشَاءُ وَأُقِيمَتِ الصَّلاَةُ فَابْدَءُوا بِالْعَشَاءِ ‏"‏ ‏.‏

It was narrated that Anas said: "The Messenger of Allah (PBUH) said: 'If dinner is ready and the Iqamah for prayer is said, then start with dinner first."' Translation Not Available

Book Ref: Sunan An Nisai Book 10 Hadith 853
Web Ref:  Sunan An Nisai Vol 1 Book 10 Hadith 854