Sunan an-Nasa'i 1326

It was narrated that Jabir bin Samurah said:"I prayed with the Messenger of Allah (ﷺ) and when we said the salam we used to gesture with our hands: 'Asalamu alaykum wa rahmatullah (peace be upon, peace be upon you).' The Messenger of Allah (ﷺ) looked at us and said: 'What is the matter with you, pointing with your hands as if they are the tails of wild horses? When any one of you says the salam, let him turn to his companions and not gesture with his hand