Phase id transitus dicitur, cf. the Vulgate, Exod. xii. 11, est enim Phase (id est transitus) Domini. The form of the word is due to defective transliteration, the correct Hebrew form being Pesach, which “is derived from a root which means to step over or to overleap, and thus points back to the historical origin of the festival (Exod. xii.).”—Edersheim’s Temple, p. 179.