Musnad Abu Ya'la al-Mawsili 167:2

Abu Khaythama narrated to us, Sufyan ibn 'Uyaynah narrated to us, from Muhammad ibn 'Ajlan, from 'Amir ibn 'Abd Allah ibn al-Zubayr, from his father, who said: I saw the Messenger of Allah, may Allah bless him and grant him peace, supplicating like this, and he pointed with his index finger.