Musnad Ahmad 32:802

Muhammad ibn Ja‘far narrated to us, Shu‘bah narrated to us, from Abu Qaza‘ah, from Anas ibn Malik, who said: "I was the rider behind Abu Talhah. The knee of Abu Talhah was almost touching the knee of the Messenger of Allah, may Allah bless him and grant him peace. The Messenger of Allah, may Allah bless him and grant him peace, was reciting the Talbiyah for both of them."