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. (Using translation from Abū Dāʾūd 1401)
أَنَّ رَسُولَ اللهِ ﷺ أَقْرَأَهُ خَمْسَ عَشْرَةَ سَجْدَةً فِي الْقُرْآنِ مِنْهَا ثَلَاثٌ فِي الْمُفَصَّلِ وَسُورَةُ الْحَجِّ سَجْدَتَيْنِ