'Staff' in the Bible

And he said unto me, Son of man, behold, I break the staff of bread in Jerusalem; and they shall eat bread by weight, and with anxiety; and they shall drink water by measure, and with astonishment:

When I send upon them the evil arrows of famine, that are for their destruction, which I send to destroy you, then will I increase the famine upon you, and will break your staff of bread.

Son of man, when a land sinneth against me by working unfaithfulness, and I stretch out my hand upon it, and break the staff of the bread thereof, and send famine upon it, and cut off man and beast from it;

And all the inhabitants of Egypt shall know that I am Jehovah, because they have been a staff of reed to the house of Israel.