Sahih Muslim 2178
Sahih Muslim · Book 39: The Book of Greetings · The Prohibition Of Making A Man Get Up From A Place That He Reached First
Jabir reported Allah's Apostle (may peace he upon him) as saying:
وَحَدَّثَنَا سَلَمَةُ بْنُ شَبِيبٍ ، حَدَّثَنَا الْحَسَنُ بْنُ أَعْيَنَ ، حَدَّثَنَا مَعْقِلٌ، - وَهُوَ ابْنُ عُبَيْدِ اللَّهِ - عَنْ أَبِي الزُّبَيْرِ ، عَنْ جَابِرٍ ، عَنِ النَّبِيِّ صلى الله عليه وسلم قَالَ " لاَ يُقِيمَنَّ أَحَدُكُمْ أَخَاهُ يَوْمَ الْجُمُعَةِ ثُمَّ لْيُخَالِفْ إِلَى مَقْعَدِهِ فَيَقْعُدَ فِيهِ وَلَكِنْ يَقُولُ افْسَحُوا " .
None amongst you should make his brother stand on Friday (during the congregational prayer) and then occupy his-place. but he should only say to him (Accommodate me).