Translation of "Dede" in English

"Puesto que aún te resistes a dejar partir a mi pueblo, mañana, a esta hora, haré caer una granizada tan fuerte como no la ha habido en Egipto dede su fundación hasta hoy."

Dost thou yet hold back my people; and wilt thou not let them go? Behold I will cause it to rain to morrow at this same hour, an exceeding great hail; such as hath not been in Egypt from the day that it was founded, until this present time.