"I was riding behind the Prophet and he continued to recite the Talbiyah until he stoned Jamratul'Aqabah. He stoned it with seven pebbles, saying the Takbir with each throw." (Using translation from Nasāʾī 3079)  

كُنْتُ رِدْفَ النَّبِيِّ ﷺ «فَلَمْ يَزَلْ يُلَبِّي حَتَّى رَمَى جَمْرَةَ الْعَقَبَةِ فَرَمَاهَا بِسَبْعِ حَصَيَاتٍ يُكَبِّرُ مَعَ كُلِّ حَصَاةٍ»