Sayyiduna Abdullah bin Umar (may Allah be pleased with them both) said: I memorised ten rak'ahs from the Prophet (peace and blessings be upon him): two rak'ahs before Zuhr and two after it, two rak'ahs after Maghrib and two rak'ahs after Isha in his house, and two rak'ahs before the morning prayer; and this was a time when no one would come in to the Prophet (peace and blessings be upon him). Sayyidah Hafsah (may Allah be pleased with her) said that when the mu'adhdhin had called the adhan and dawn had broken, he (peace and blessings be upon him) would pray two rak'ahs.
Hadith Referenceالسنن الكبرى للبيهقي / كتاب الصلاة / 4474