'Weak' in the Bible

All hands shall be feeble, and all knees shall be weak as water.

How weak is your heart, says the Lord Yahweh, since you do all these things, the work of an impudent prostitute;

It shall be, when they tell you, Why do you sigh? that you shall say, Because of the news, for it comes; 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 comes, and it shall be done, says the Lord Yahweh.