Prayer (Kitab Al-Salat): Details of Commencing Prayer
Dawud :: Book 3 : Hadith 1148
Narrated Abdullah ibn Amr ibn al-'As:
The Prophet (peace_be_upon_him) used to say on the day of the breaking of the fast seven takbirs in the first rak'ah and then recite the Qur'an, and utter the takbir (Allah is most great). Then he would stand, and utter the takbir four times. Thereafter he would recite the Qur'an and bow.