The Prophet ﷺ ; was asked about the offspring of the pagans. He said, "Allah knows what they would have done (were they to live).  

سُئِلَ النَّبِيُّ ﷺ عَنْ أَوْلاَدِ الْمُشْرِكِينَ فَقَالَ اللَّهُ أَعْلَمُ بِمَا كَانُوا عَامِلِينَ  

Messenger of Allah ﷺ was asked about the offspring of the pagans. He said, "Allah knows what they would have done (were they to live)."  

أَنَّهُ سَمِعَ أَبَا هُرَيْرَةَ يَقُولُ سُئِلَ رَسُولُ اللَّهِ ﷺ عَنْ ذَرَارِيِّ الْمُشْرِكِينَ فَقَالَ {اللَّهُ أَعْلَمُ بِمَا كَانُوا عَامِلِينَ }  

Messenger of Allah ﷺ said, "No child is born but has the Islamic Faith, but its parents turn it into a Jew or a Christian. It is as you help the animals give birth. Do you find among their offspring a mutilated one before you mutilate them yourself?" The people said, "O Messenger of Allah ﷺ! What do you think about those (of them) who die young?" The Prophet ﷺ said, "Allah knows what they would have done (were they to live)."  

قَالَ رَسُولُ اللَّهِ ﷺ مَا مِنْ مَوْلُودٍ إِلاَّ يُولَدُ عَلَى الْفِطْرَةِ فَأَبَوَاهُ يُهَوِّدَانِهِ وَيُنَصِّرَانِهِ كَمَا تُنْتِجُونَ الْبَهِيمَةَ هَلْ تَجِدُونَ فِيهَا مِنْ جَدْعَاءَ حَتَّى تَكُونُوا أَنْتُمْ تَجْدَعُونَهَا قَالُوا يَا رَسُولَ اللَّهِ أَفَرَأَيْتَ مَنْ يَمُوتُ وَهْوَ صَغِيرٌ قَالَ {اللَّهُ أَعْلَمُ بِمَا كَانُوا عَامِلِينَ}