[Machine] The Messenger of Allah ﷺ would not know the division of the surah (chapter) until "Bismillah Al-Rahman Al-Raheem" (In the name of Allah, the Most Gracious, the Most Merciful) would be revealed to him.
كَانَ رَسُولُ اللهِ ﷺ لَا يَعْرِفُ فَصْلَ السُّورَةِ حَتَّى تَنْزِلَ عَلَيْهِ بِسْمِ اللهِ الرَّحْمَنِ الرَّحِيمِ