It is narrated from Sayyiduna Ibn Umar (may Allah be pleased with them both) that I have memorized from the Prophet (peace and blessings be upon him) ten rak‘ahs apart from the obligatory prayers: two rak‘ahs before the Zuhr prayer and two after it, two rak‘ahs after Maghrib, two rak‘ahs after ‘Isha, and two rak‘ahs before the Fajr prayer.
Hadith Referenceمسند احمد / مسند المكثرين من الصحابة / 5758
Hadith Gradingحکم دارالسلام:حديث صحيح، وهذا إسناد حسن.