Musannaf Ibn Abi Shaybah 7392 — A man who prays Fajr and then finds

Al-Hasan said: In the time of Sayyiduna Abdullah bin Abbas, the people were in doubt about whether dawn had broken. He ordered his muezzin, who called the iqamah, and Sayyiduna Ibn Abbas (may Allah be pleased with them both) stepped forward and led the prayer. He recited the whole of Surah al-Baqarah, then bowed, then prostrated, then stood for the second rak'ah and recited the whole of Surah Al Imran. Then he bowed and then prostrated. When they finished the prayer, it had become light.