Sunan Abu Dawud
1934
Sahih+2

Ibn Mas’ud said “ I never saw the Apostle of Allaah(ﷺ) observe a prayer out of its proper time except(two prayers) at Al Muzdalifah. He combined the sunset and night prayers at Al Muzdalifah and he offered the dawn prayer that day before its proper time

SahihAl-Albani
SahihMuhammad Muhyi Al-Din Abdul Hamid