Al-Hasan ibn Muhammad narrated from Al-Mithami from Mu‘awiyah ibn Wahb from ‘Ubayd ibn Zurarah, who said: I asked Abu Abdillah عليه السلام about the best time for Dhuhr prayer. Imam عليه السلام said: "An arm’s span (dhira‘) after the sun’s zenith." I asked: "Is it the same in winter and summer?" Imam عليه السلام said: "Yes."