Ibn Sirin محمد بن سيرين الأنصاري · The Book of the Commencement of the Prayer

X"I heard Abu Uthman narrate that Ibn Mas'ud said: 'The Prophet (ﷺ) saw me when I had placed my left hand on my right in prayer. He took hold of my right hand and placed it on my left.'"

"We prostrated with the Messenger of Allah (ﷺ) during: When the heaven is split asunder and Read! In the Name of your Lord."

(Another chain) from Abu Hurairah, with similar.