Sa'id bin Jubayr (may Allah have mercy on him) narrated: We moved on (from Arafah) with Sayyiduna Ibn Umar (may Allah be pleased with them both), and he prayed three rak'ahs of Maghrib and two of Isha with one iqamah, then said: "This is how the Messenger of Allah (peace and blessings be upon him) led us in prayer at this place."
(b) In Sahih Muslim a narration with the same meaning is reported from Sa'id bin Jubayr (may Allah have mercy on him).
Hadith Referenceالسنن الكبرى للبيهقي / كتاب الصلاة / 1881