The Prophet ﷺ stayed in Mecca for 19 days during which he prayed 2 rakʿat in each prayer.  

أَقَامَ النَّبِيُّ ﷺ بِمَكَّةَ تِسْعَةَ عَشَرَ يَوْمًا يُصَلِّي رَكْعَتَيْنِ  

The Messenger of Allah ﷺ stayed in Makkah (for fifteen days), praying each prayer with two rak'ahs.  

أَنَّ رَسُولَ اللَّهِ ﷺ أَقَامَ بِمَكَّةَ خَمْسَةَ عَشَرَ يُصَلِّي رَكْعَتَيْنِ رَكْعَتَيْنِ  

The Messenger of Allah ﷺ stayed in Mecca seventeen days and prayed two rak'ahs (at each time of prayer).  

أَنَّ رَسُولَ اللَّهِ ﷺ أَقَامَ بِمَكَّةَ سَبْعَ عَشْرَةَ يُصَلِّي رَكْعَتَيْنِ  

It was narrated from Ibn ‘Abbas that the Messenger of Allah ﷺ stayed in Makkah for fifteen nights during the year of the Conquest, (during which time) he shortened his prayer.  

أَنَّ رَسُولَ اللَّهِ ﷺ أَقَامَ بِمَكَّةَ عَامَ الْفَتْحِ خَمْسَ عَشْرَةَ لَيْلَةً يَقْصُرُ الصَّلاَةَ  

The Messenger of Allah ﷺ stayed in Makkah (for fifteen days), praying each prayer with two rak'ahs. (Using translation from Nasāʾī 1453)   

أَنَّ رَسُولَ اللهِ ﷺ «أَقَامَ بِمَكَّةَ خَمْسَ عَشْرَةَ يُصَلِّي رَكْعَتَيْنِ رَكْعَتَيْنِ»