Narrated `Abbad bin Tamim: that his uncle said, "I saw Allah's Apostle lying flat (on his back) in the mosque with one leg on the other." Narrated Sa`id bin Al-Musaiyab that `Umar and `Uthman used to do the same.
Hadith Referenceصحيح البخاري / كتاب الصلاة / 475
Hadith Gradingمحدثین:أحاديث صحيح البخاريّ كلّها صحيحة