Musnad Ahmad 1060:69

It was read to Abd al-Rahman: Malik, from Yahya ibn Sa'id, from Adi ibn Thabit al-Ansari, from Abdullah ibn Yazid al-Khatmi, that Abu Ayyub al-Ansari informed him: "That he prayed with the Messenger of Allah, may Allah bless him and grant him peace, during the Farewell Pilgrimage, the Maghrib and the Isha [prayers] together at Muzdalifah."