Abdullah bin Umar saw me toying with the pebbles during the prayer. When I had finished, he told me not to do that and said, "Do as the Messenger of Allah ﷺ used to do."I asked, "How did the Messenger of Allah ﷺ do it?"He replied, "When he sat in the prayer, he placed his right palm on his right thigh, closed all his fingers, and pointed with the finger next to the thumb, and he placed his left palm on his left thigh." Then he said, "This is how he used to do it."
حدثني يحيى عن مالك عن مسلم بن أبي مريم
رآني عبد الله بن عمر وأنا أعبث بالحصباء في الصلاة فلما انصرفت نهاني وقال اصنع كما كان رسول الله ﷺ يصنع فقلت وكيف كان رسول الله ﷺ يصنع قال كان إذا جلس في الصلاة وضع كفه اليمنى على فخذه اليمنى وقبض أصابعه كلها وأشار بأصبعه التي تلي الإبهام ووضع كفه اليسرى على فخذه اليسرى وقال هكذا كان يفعل