Bukhari Vol. 6 : No. 93 (Hadith)

Narrated Ibn 'Abbas (Radi-Allahu 'anhu):

I stayed overnight in the house of my aunt Maimuna. Allah's Apostle
(Sallallahu 'Alaihi Wa Sallam) talked with his wife for a while and then
went to bed. When it was the last third of the night, he got up and looked
towards the sky and said:

"Verily! In the creation of the Heavens and the Earth and in the alteration
of night and day, there are indeed signs for men of understanding." (3.190)


Then he stood up, performed ablution, brushed his teeth with a Siwak, and
then prayed eleven Rakat. Then Bilal pronounced the Adhan (i.e. call for
the Fajr prayer). The Prophet (Sallallahu 'Alaihi Wa Sallam) then offered
two Rakat (Sunna) prayer and went out (to the Mosque) and offered the
(compulsory congregational) Fajr prayer.