Whenever the Prophet ﷺ sat during the prayer, he would spread out his left foot beneath him until the top of it became darkened.
حدثنا هناد بن السري عن وكيع عن سفيان عن الزبير بن عدي
كان النبي ﷺ إذا جلس في الصلاة افترش رجله اليسرى حتى اسود ظهر قدمه
No references are available.
his hearing. Explicit statement of the takhrij: [its isnad is daif] the chain is mursal, and Thawri was mentioned before, hadith 748, and I did not find