Musnad Ahmad 25:768

Musa ibn Dawud narrated to us, he said: Ibn Lahi'ah narrated to us, from Ibn Hubayrah, that Maymun al-Makki informed him: That he saw Abdullah ibn al-Zubayr praying with them, gesturing with his palms when he stood, and when he bowed, and when he prostrated, and when he rose to stand; so he would stand and gesture with his hands. He said: So I went to Ibn Abbas and said: "I saw Ibn al-Zubayr praying a prayer the likes of which I have not seen anyone pray." And I described this gesture to him. He said: "If you wish to look at the prayer of the Prophet, may Allah bless him and grant him peace, then follow the prayer of Ibn al-Zubayr."