Abu Karayb, Muhammad bin al-'Ala' محمد بن العلاء - أبو كريب · The Book on Salat (Prayer)

the Prophet said "When the Imam says 'Amin' then (all of you) say 'Amin.' For whoever's 'Amin' concurs with the 'Amin' of the angels, then his past sins will be forgiven."

"I was with my father at the plains of Namirah. I passed by a mount and saw Allah's Messenger standing in Salat." He said: "I was looking at the earthiness of his armpits when he prostrated." : "Whiteness."

"I arrived in Al-Madinah and I said, 'Let me look at the Salat of Allah's Messenger.' When he sat - meaning for At-Tashah-hud - he spread his left foot, and placed his left hand - meaning on his left thigh - and held his right foot erect."

the Prophet said: "The Salat in Masjid Quba is like Umrah."

Allah's Messenger said: "Perform Salat in sheep pens but do not perform Salat in the camels' resting area."

from the Prophet and it is the same or similar.

"The Prophet (S) prohibited than a man to pray with his hands on his hip."

Another chain with similar narration