And it shall be, when they say   unto thee, Wherefore sighest   thou? that thou shalt answer , For the tidings ; because it cometh  : and every heart  shall melt , and all hands  shall be feeble , and every spirit  shall faint , and all knees  shall be weak   as water : behold, it cometh , and shall be brought to pass , saith   the Lord  GOD.