The Prophet ﷺ was in a chamber, and he would come out to pray there. His companions noticed this and began to pray along with him.
حدثنا وكيع حدثنا عبد الله بن سعيد بن أبي هند عن سالم أبي النضر عن بسر بن سعيد
أن النبي ﷺ كان بحجرة فكان يخرج يصلي فيها ففطن له أصحابه فكانوا يصلون بصلاته
No references are available.
Its isnad is sahih. It was mentioned previously in .