The Prophet ﷺ taught me fifteen prostrations while reciting the Qur'an, including three in al-Mufassal and two in Surah al-Hajj. Abu Dawud said: Abu al-Darda' has reported eleven prostrations from the Prophet ﷺ, but chain of this tradition is weak.  

أَنَّ رَسُولَ اللَّهِ ﷺ أَقْرَأَهُ خَمْسَ عَشْرَةَ سَجْدَةً فِي الْقُرْآنِ مِنْهَا ثَلاَثٌ فِي الْمُفَصَّلِ وَفِي سُورَةِ الْحَجِّ سَجْدَتَانِ  

I said to the Messenger of Allah ﷺ: Are there two prostrations in Surah al-Hajj? He replied: Yes; if anyone does not make two prostrations, he should not recite them.  

قَالَ قُلْتُ لِرَسُولِ اللَّهِ ﷺ أَفِي سُورَةِ الْحَجِّ سَجْدَتَانِ قَالَ نَعَمْ وَمَنْ لَمْ يَسْجُدْهُمَا فَلاَ يَقْرَأْهُمَا