"The Prophet allowed Sawdah to leave Jam (Al-Muzdalifah) before dawn because she was a heavyset woman.
Sunan an-Nasa'i Book 24, Hadith 420
← Previous Hadith "We used to leave Jam Al-Muzdalifah for Mina at the end of the night, during the time of the Messenger of Allah."

Sunan an-Nasa'i Book 24, Hadith 419 Next Hadith → "I never saw the Messenger of Allah offer any prayer except at the proper time, apart from Maghrib and Isha in Jam (Al-Muzdalifah) and Fajir on that day, which he offered before the usual time.

Sunan an-Nasa'i Book 24, Hadith 421