Rifa bin Rafi reported from his uncle, from the Prophet ﷺ, the same story, in which he said, "When you stand for your prayer, say the takbir glorifying Allah the Exalted, then recite whatever is easy for you from the Quran."He also said in it, "When you sit in the middle of the prayer, settle yourself calmly and spread out your left thigh beneath you, then recite the tashahhud. Then when you stand up, do the same, until you complete your prayer."
حدثنا مؤمل بن هشام حدثنا إسمعيل عن محمد بن إسحق
عن عمه رفاعة بن رافع عن النبي ﷺ بهذه القصة قال إذا أنت قمت في صلاتك فكبر الله تعالى ثم اقرأ ما تيسر عليك من القرآن وقال فيه فإذا جلست في وسط الصلاة فاطمئن وافترش فخذك اليسرى ثم تشهد ثم إذا قمت فمثل ذلك حتى تفرغ من صلاتك
597, 638 - Reference: [its isnad is hasan] Bayhaqi reported it: 2/133, 134, from the hadith of Abu Dawud, through his route, and Ibn Khuzayma graded it sahih, hadith no.: