Messenger of Allah ﷺ said, "People will not stop asking questions till they say, 'This is Allah, the Creator of everything, then who created Allah?' "
قَالَ رَسُولُ اللَّهِ ﷺ لَنْ يَبْرَحَ النَّاسُ يَتَسَاءَلُونَ حَتَّى يَقُولُوا هَذَا اللَّهُ خَالِقُ كُلِّ شَىْءٍ فَمَنْ خَلَقَ اللَّهَ
I heard Abu Huraira saying that the Messenger of Allah ﷺ observed: people will certainly ask you about everything till they will propound: Allah created every thing, but who created Allah?
قَالَ رَسُولُ اللَّهِ ﷺ لَيَسْأَلَنَّكُمُ النَّاسُ عَنْ كُلِّ شَىْءٍ حَتَّى يَقُولُوا اللَّهُ خَلَقَ كُلَّ شَىْءٍ فَمَنْ خَلَقَهُ
[Machine] The Messenger of Allah ﷺ said, "Indeed, Allah said to me that my nation will continue to question each other until they say, 'This is Allah who created the people, so who created Allah?'"
قَالَ رَسُولُ اللهِ ﷺ إِنَّ اللهَ قَالَ لِي إِنَّ أُمَّتَكَ لَا يَزَالُونَ يَتَسَاءَلُونَ فِيمَا بَيْنَهُمْ حَتَّى يَقُولُوا هَذَا اللهُ خَلَقَ النَّاسَ فَمَنْ خَلَقَ اللهَ؟
"لَنْ تَبرحَ النَّاسُ يَتَسَاءَلُونَ هَذَا اللهُ خَالقُ كُلِّ شَيْءٍ فَمَنْ خَلَقَ اللهَ؟ ".