Musnad Ahmad 930:6

Abdullah narrated to us, Rawh ibn Abd al-Mu'min al-Muqri' narrated to us, Umar ibn Shaqiq narrated to us, Abu Ja'far al-Razi narrated to us, from al-Rabi' ibn Anas, from Abu al-'Aliyah, from Ubayy ibn Ka'b, who said: "The sun was eclipsed during the time of the Messenger of Allah (may Allah bless him and grant him peace), and the Messenger of Allah (may Allah bless him and grant him peace) led them in prayer. He recited a surah from the long ones, then he bowed five times and prostrated twice. Then he stood for the second [rak'ah] and recited a surah from the long ones, then he bowed five times and prostrated twice. Then he sat as he was, facing the qiblah, supplicating until its eclipse cleared."