Yahya related to me from Malik from Yahya ibn Said from Adi ibn Thabit al-Ansari that Abdullah ibn Yazid al-Khatmi told him that Abu Ayyub al-Ansari told him that he prayed maghrib and isha together at Muzdalifa during the farewell hajj, with the Messenger of Allah, may Allah bless him and grant him peace.
Muwatta Malik Book 20, Hadith 210
← Previous Hadith Yahya related to me from Malik from Musa ibn Uqba that Kurayb, the mawla of Ibn 'Abbas, heard Usama ibn Zayd say, "The Messenger ofAllah, may Allah bless him and grant him peace, left Arafa and then, when he reached ash-Shib, he dismounted and urinated and then did wudu, though not thoroughly. I said to him, 'It is time for the prayer, Messenger of Allah,' and he said 'The prayer is ahead of you,' and then mounted. When we arrived at Muzdalifa he dismounted and did wudu thoroughly. Then the iqama was said for the prayer and he prayed maghrib. After that everyone settled his camel in its resting-place, and then the iqama for isha was said and he prayed it, without having prayed anything between the two."

Muwatta Malik Book 20, Hadith 209 Next Hadith → Yahya related to me from Malik from Nafi that Abdullah ibn Umar used to pray maghrib and isha together at Muzdalifa.

Muwatta Malik Book 20, Hadith 211