When the Messenger of Allah ﷺ sat during prayer, he would place his left foot between his thigh and his shin, spread out his right foot, place his left hand on his left knee, place his right hand on his right thigh, and point with his finger.In another narration, when the Messenger of Allah ﷺ sat to make supplication, he would place his right hand on his right thigh and his left hand on his left thigh, point with his index finger, place his thumb on his middle finger, and cup his left palm over his knee.
كان رسول الله ﷺ إذا قعد في الصلاة جعل قدمه اليسرى بين فخذه وساقه، وفرش قدمه اليمنى، ووضع يده اليسرى على ركبته اليسرى، ووضع يده اليمنى على فخذه اليمنى، وأشار بإصبعه. وفي رواية: كان رسول الله ﷺ إذا قعد يدعو وضع يده اليمنى على فخذه اليمنى، ويده اليسرى على فخذه اليسرى، وأشار بإصبعه السبابة، ووضع إبهامه على إصبعه الوسطى، ويلقم كفه اليسرى ركبته.
Muslim included it in the Book of Mosques (579), the first narration, via the route of Uthman bin Hakeem, who said, Amir bin Abdullah bin Zubayr narrated to me, from his father, and he mentioned the same. The second narration is via the route of Layth and Abu Khalid Ahmar, both from Ibn Ajlan, from Amir bin Abdullah bin Zubayr, from his father, and he mentioned the same.Abu Dawud (989), Nasai (1270), and Bayhaqi (2/131) narrated it via the route of Ziyad bin Saad Khurasani, from Muhammad bin Ajlan, adding to it, "He used to point with his finger when making supplication, but not move it."Ziyad bin Saad Khurasani is reliable, one of the men whose narrations are accepted by the wider community of scholars. Nawawi said in Majmu (3/454), "Its chain of transmission is sahih." I would say its chain is hasan, for Muhammad bin Ajlan is truthful.As for his statement, "but not move it," this is an explanation of his statement, "he pointed with it," and therefore there is no contradiction between the two wordings.