descents

But this said he to me: The ladder which thou sawest, which had twelve steps having two human faces which changed their appearance—now this ladder is this age, and the twelve steps are the times of this age, and the twenty-four faces are the kings of the lawless heathen of this age. Under these kings will be tried . . . of thy sons: they will rise up against the lawlessness of thy descendants and will lay this place waste through four descents of the sins of thy descendants, and of the substance of the forefathers will be built this palace in the temple of the name of thy God and thy fathers; but through the wrath of thy descendants will it be desolate until the fourth descent of this age: for thou didst see four visions.