(10) باب فِي الإِمَامِ إِذَا رَأَى الرَّجُلَ قَدْ وَضَعَ شِمَالَهُ عَلَى يَمِينِهِ
It was narrated that Al Hajjaj bin Abi Zainab said:
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.'"
Reference: Sunan an-Nasa'i 888
In-book reference: Book 11, Hadith 13
English translation: Vol. 2, Book 11, Hadith 889