Sahih Bukhari
Merits of the Helpers in Madinah (Ansaar)
Volume: 005 / Book Number: 058 / Hadith Number: 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.