Sahih al-Bukhari 787

It is related from Muhammad ibn 'Amr ibn 'Ata' that he was sitting with a group of the Companions of the Prophet. "We mentioned the prayer of the Prophet, may Allah bless him and grant him peace, and Abu Humayd as-Sa'idi said, 'I remember the prayer of the Messenger of Allah, may Allah bless him and grant him peace, better than any of you. I saw that when he said the takbir he lifted his hands level with his shoulders. When he did ruku', he placed his hands on his knees and then bent his back straight. When he raised his head, he stood up straight until each vertebra had returned to its place. When he went into sajda, he placed his arms so that they were neither stretched out nor held close. The toes of his feet pointed towards the qibla. When he sat after the first two rak'ats, he sat on his left foot and kept his right foot upright. When he sat after the last rak'at, he extended his left foot across, keeping the other upright and sat on his buttocks." It is related from al-Layth, "every vertebra." It is related from Muhammad ibn 'Amr, "every vertebra." LXII: Someone who thinks that the first tashahhud is not obligatory because the Prophet stood up after the first two rak'ats and did not go back