Majma al-Zawaid 1788 — Further reports on the time of Fajr prayer

Amr bin Dinar narrates that he heard the son of Sayyiduna Abdullah bin Mas'ud (may Allah be pleased with him) say: Sayyiduna Abdullah bin Mas'ud (may Allah be pleased with him) used to offer the morning prayer in the darkness, just as Sayyiduna Abdullah bin al-Zubayr (may Allah be pleased with them both) offered it in the darkness, and he would offer the Maghrib prayer when the sun had set. He used to say that it is as Allah Almighty has said: "Until the darkness of the night, and the recitation at Fajr; indeed, the recitation at Fajr is ever witnessed (by the angels)."
Imam al-Tabarani recorded it in al-Mu'jam al-Kabir; its chain contains a narrator who is not named.