Ibn Umar (Allah be pleased with them) reported that Allah's Messenger (ﷺ) observed the sunset and 'Isha' prayers together at Muzdalifa.
Sahih Muslim Book 15, Hadith 314
← Previous Hadith Abdullah b. Yazid al-Khatmi reported on the authority of Abu Ayyub (Allah be pleased with him) that he prayed the sunset and 'Isha' prayers (together) at Muzdalifa in the company of Allah's Messenger (ﷺ) on the occasion of the Farewell Pilgrimage.

Sahih Muslim Book 15, Hadith 313 Next Hadith → Ubaidullah b. 'Abdullah b. 'Umar reported on the authority of his father (Allah be pleased with them) that Allah's Messenger (ﷺ) combined the sunset and 'Isha', prayers at Muzdalifa and there was no prostration (i. e. any rak'ahs of Sunan or Nawafil prayers) in between them. He observed three rak'ahs of the sunset prayer and two rak'ahs of the 'Isha' prayer, and 'Abdullah (b. 'Umar) observed the prayers in this very manner (at Muzdalifa) until he met his Lord.

Sahih Muslim Book 15, Hadith 315