Abbas bin Sahl bin Sa'd عباس بن سهل بن سعد الساعدي · The Book on Salat (Prayer)

"Abu Humaid, Abu Usaid, Sahl bin Sa'd, and Muhammad bin Maslamah were once together and they were mentioning the Salat of Allah's Messenger. Abu Humaid said: 'I am the most knowledgeable among you of the Salat of Allah's Messenger: Allah's Messenger would bow and place his hands on his knees as if he was grasping them, and he would draw his forearms to hold them away from his sides.'"

"When the Prophet would prostrate, he placed his nose and his forehead on the ground, and he held his forearms away from his sides, and he placed his hands parallel to his shoulders."

"Abu Humaid, Abu Usaid, Sahl bin Sa'd, and Muhammad bin Maslamah were once together and they were mentioning the Salat of Allah's Messenger. Abu Humaid said: "I am the most knowledgeable among you of the Salat of Allah's Messenger: Indeed Allah's Messenger sat - meaning for Tashah-hud - he spread his left foot, and made the top of his right (foot) face the Qiblah, and he placed his right hand on his right knee, and his left hand on his…