From Sahih Muslim (Hadith 3115):
Sa'id b. Jubair reported:We came back along with Ibn 'Umar till we reached Muzdalifa. There he led us in the sunset and 'Isha' prayers with one iqama and we then proceeded and he said: This is how Allah's Messenger (ﷺ) led us in prayer at this place
Reference: Muslim 3115