Sunan an-Nasa'i 1952
سنن النسائي#1952SahihIt was narrated that Ibn 'Abbas said:"The Messenger of Allah was asked about he children of the idolators and he said: 'Allah knows best what they would have done
Scholarly Authentication
We show the most cautious grade (weakest-wins) as the overall label. Individual scholars graded it as follows:
Abu GhuddahSahih
Al-AlbaniSahih
Zubair Ali ZaiHasan
In-book reference: 21:135