Musnad Ahmad

It is narrated from Hazrat Wa'il (may Allah be pleased with him) that I prayed behind the Noble Prophet (peace and blessings be upon him). The Noble Prophet (peace and blessings be upon him) faced the Qiblah and said the Takbeer, and raised both hands up to the level of his shoulders. Then, wrapping himself in his garment, he held his left hand with his right hand. When he intended to bow (ruku'), he took his hands out and again, performing raf' al-yadayn, raised his hands up to the level of his shoulders. When he raised his head from ruku' and said "Sami' Allahu liman hamidah," he again, performing raf' al-yadayn, raised his hands up to the level of his shoulders. And when he went into prostration (sajdah), he prostrated between his palms.