three hundred] Three hundred and ninetie dayes represent so many years; from the division of the kingdome (or falling away of the ten tribes by Jeroboam) to Jeusalems flames, are 390 years; the whole time is exactly noted by applying a day to a year: during which the Lord endured the sinnes of the whole Nation, namely of the ten Tribes and Judah.
so shalt thou] Numbers 14:34.