Sunan An-Nasai, Chapter: The Book of the Times (of Prayer)

"We stopped to camp at the end of the night with the Messenger of Allah (saw), and we did not wake up until the sun had risen. The Messenger of Allah (saw) said: 'Let each man take hold of his camel's head (and leave), for the Shaitan was here in this place with us.' We did that, then he called for water and performed Wudu, then he prayed two Rakahs, then the Iqamah was said and he prayed Al-Ghadah (Fajr)." (Sahih)