(5) باب السَّلاَمِ بِالأَيْدِي فِي الصَّلاَةِ
It was narrated that Jabir bin Samurah said:
"The Messenger of Allah (ﷺ) came out to us and we were raising our hands during the Salah. He said: 'Why are you raising your hands while praying, like the tails of wild horses? Stay still when you are praying.'"
Reference: Sunan an-Nasa'i 1184
In-book reference: Book 13, Hadith 6
English translation: Vol. 2, Book 13, Hadith 1185