Al-Hakam said:

Sa'eed bin Jubair led us in praying Maghrib in Muzdalifah, three rak'ah's with an iqamah. Then he said the salam, then he prayed 'Isha' with two rak'ahs. Then he stated that 'Abdullah bin ‘Umar did that, and he stated that the Messenger of Allah (ﷺ) did that.