Hadith 4:921
Abu Khalid al-Ahmar narrated to us, from Hajjaj, from ‘Amr ibn Shu’ayb, from his father, from his grandfather, from the Prophet (peace be upon him), the like of it, and he said: "Fast a day in its place."
حدثنا أبو خالد الأحمر عن حجاج عن عمرو بن شعيب عن أبيه عن جده عن النبي صلى الله عليه وسلم مثله وقال صم يوما مكانه