Sunan an-Nasa'i 986
سنن النسائي#986Sahihأَخْبَرَنَا قُتَيْبَةُ، قَالَ حَدَّثَنَا سُفْيَانُ، عَنِ الزُّهْرِيِّ، عَنْ عُبَيْدِ اللَّهِ، عَنِ ابْنِ عَبَّاسٍ، عَنْ أُمِّهِ، أَنَّهَا سَمِعَتِ النَّبِيَّ صلى الله عليه وسلم يَقْرَأُ فِي الْمَغْرِبِ بِالْمُرْسَلاَتِ .
It was narrated from Ibn Abbas from his mother that:She heard the Prophet (ﷺ) recite Al-Mursalat in Maghrib
Scholarly Authentication
The label above is the grade most of these scholars gave — one dissenting opinion no longer speaks for all of them. If any scholar calls a narration fabricated, that verdict is shown instead, whatever the others say. Each scholar's own wording:
Abu Ghuddah-
Zubair Ali ZaiSahih - Agreed Upon
In-book reference: 11:111