The son of Sayyiduna Abdullah bin Mas'ud (may Allah be pleased with him) narrates: Sayyiduna Abdullah bin Mas'ud (may Allah be pleased with him) used to pray Fajr in the darkness, just as Sayyiduna Ibn al-Zubayr (may Allah be pleased with him) prayed it in the darkness, and he used to pray Maghrib as soon as the sun set, and he would say: "By Allah! It is exactly as Allah Almighty has said: Until the darkness of the night, and (hold to) the recitation of dawn; indeed, the recitation of dawn is witnessed (by the angels)" [Surah al-Isra: 78].
Hadith Referenceالمعجم الكبير للطبراني / باب العين / 9251