Maliks Muwatta Book 20, Hadith Number 206.

Section : Doing the Prayer at Muzdalifa.

Yahya related to me from Malik from Musa ibn Uqba that Kurayb, the mawla of Ibn ‘Abbas, heard Usama ibn Zayd say, “The Messenger of Allah, 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.”