Musannaf Ibn Abi Shayba 8:768

Abu Bakr narrated to us, he said: Ali bin Mushir, Ibn Fudayl, and Abd al-Rahim bin Sulayman narrated to us, from Yazid bin Abi Ziyad, from Sulayman bin Amr bin al-Ahwas, from his mother, who said: I saw the Messenger of Allah (may Allah bless him and grant him peace) on the Day of Sacrifice. He came to Jamrat al-Aqaba and stoned it, then he departed. Some of them said: He did not stop. Ibn Mushir added: He stoned it with seven pebbles, saying the takbir with every pebble.