Sunan an-Nasa'i 1950
سنن النسائي#1950Sahihأَخْبَرَنَا مُحَمَّدُ بْنُ عَبْدِ اللَّهِ بْنِ الْمُبَارَكِ، قَالَ حَدَّثَنَا الأَسْوَدُ بْنُ عَامِرٍ، قَالَ حَدَّثَنَا حَمَّادٌ، عَنْ قَيْسٍ، - هُوَ ابْنُ سَعْدٍ - عَنْ طَاوُسٍ، عَنْ أَبِي هُرَيْرَةَ، أَنَّ النَّبِيَّ صلى الله عليه وسلم سُئِلَ عَنْ أَوْلاَدِ الْمُشْرِكِينَ فَقَالَ " اللَّهُ أَعْلَمُ بِمَا كَانُوا عَامِلِينَ " .
It was narrated that Abu Hurairah said:"The Messenger of Allah was asked about the children of the idolators and he said: 'Allah knows best what they would have done
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:
In-book reference: 21:133