Al-Hasan ibn Muhammad ibn Sama‘ah from Ali ibn Shajarah from ‘Ubayd ibn Zurarah from Abu Abdillah عليه السلام, who said: I said to Him عليه السلام: "Our companions may be gathered in one place, and some of them get up to pray Dhuhr while others get up to pray ‘Asr." Imam عليه السلام said: "All of that is permissible (wasi‘)."