Sunan Abi Dawud 1926
سنن أبي داود#1926Sahih‘Abd Allah bin ‘Umar said The apostle of Allaah(ﷺ) combined the sunset and the night prayers at Al Muzdalifah
Scholarly Authentication
We show the most cautious grade (weakest-wins) as the overall label. Individual scholars graded it as follows:
Al-AlbaniSahih
Muhammad Muhyi Al-Din Abdul HamidSahih
Shuaib Al ArnautSahih
Zubair Ali ZaiSahih Muslim (703 After 1287)
In-book reference: 11:206