Sahih Al Bukhari – Book of Characteristics Of Prayer

Volumn 001, Book 012, Hadith Number 765.
—————————————–
Narated By Thabit RA: Anas used to demonstrate to us the prayer of the Prophet PBUH  and while demonstrating, he used to raise his head from bowing and stand so long that we would say that he had forgotten (the prostration).

comment: in our prayers we perform this action in so much hurry which we should not do.