English translation
[1311] 116 - (...) It was narrated from 'Alī bin 'Abdur-Rahmān Al-Mu'āwī that he said: "Abdullāh bin 'Umar saw me playing with the pebbles while in prayer. When he had finished he told me not to do that. He said: 'Do what the Messenger of Allāh ﷺ used to do.' I said: 'What did the Messenger of Allāh ﷺ do?' He said: 'When he sat (in Tashah-hud) during the prayer, he placed his right hand on his right thigh and clenched all his fingers, and pointed with the finger that is next to the thumb, and he put his left hand on his left thigh.'"
