Sahih Muslim
The Book of Prayers (Kitab Al-Salat)
Book Number: 004 / Hadith Number: 760
This hadith has been transmitted with the same chain of transmitters by al. Zuhri as narrated by Ibn Juraij (who) said. When the Messenger of Allah (may peace be upon him) stood up for prayer, he raised hands (to the height) apposite the shoulders and then recited takbir.