KJV:
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.
NASB:
"And when they say to you, 'Why do you groan?' you shall say, 'Because of the news that is coming; and every heart will melt, all hands will be feeble, every spirit will faint and all knees will be weak as water. Behold, it comes and it will happen,' declares the Lord GOD."