It was narrated that 'Abdullah said:
"I never saw the Messenger of Allah (ﷺ) combine any two prayers except in Al-Muzdalifah, and on that day he prayed Subh before its time." (ID)
English reference (ID): Vol. 1, Book 6, Hadith 609 (ID)
Arabic reference (ID): Book 6, Hadith 615 (ID)