The Messenger of Allah ﷺ prayed on the day of the Conquest (of Mecca) eight rak'ahs saluting after every two rak'ahs. Abu Dawud said: Ahmad b. Salih said that the Messenger of Allah offered prayer in the forenoon on the day of the Conquest of Mecca, and he narrated something similar. Ibn al-Sarh reported that Umm Hani said: The Messenger of Allah ﷺ entered upon me. This version does not mention the prayer in the forenoon. (Using translation from Abū Dāʾūd 1290)
أَنَّ رَسُولَ اللهِ ﷺ يَوْمَ الْفَتْحِ صَلَّى سُبْحَةَ الضُّحَى ثَمَانِ رَكَعَاتٍ يُسَلِّمُ مِنْ كُلِّ رَكْعَتَيْنِ