Musannaf Ibn Abi Shaybah 3294 — Those who used to pray it in the light

Abd al-Malik bin Umayr said: Sayyiduna al-Mughirah bin Shu'bah (may Allah be pleased with him) led the morning prayer in the darkness and also in the light, so much so that I said: "The sun has risen," or "The sun has not risen." He also performed the Fajr prayer between those two times. His muezzin was Ibn al-Nabbah; he had no muezzin other than him.