Volume 5 · Book 58 · Hadith 179
Narrated 'Umar: The pagans used not to leave Jam' (i.e. Muzdalifa) till the sun had risen on Thabir mountain. The Prophet contradicted them by leaving (Muzdalifa) before the sun rose.
— Sahih Bukhari, Volume 5, Book 58: Merits of the Helpers in Madinah (Ansaar), Hadith #179